A cable exerts a constant upward tension of magnitude 2. 58 ✕ 104 n on a 2. 40 ✕ 103 kg elevator as it rises through a vertical distance of 1. 70 m.
(a) Find the work done by the tension force on the elevator (in J). (b) Find the work done by the force of gravity on the elevator (in J)
Answers
(a) The work done by the tension force on the elevator is 4.386 × 10^4 J.
(b) The work done by the force of gravity on the elevator is 3.999 × 10^4 J.
(a) The tension force on the elevator will exert a force of 2.58 × 10^4 N on it. The distance the elevator will rise is 1.70 m. The work done by the tension force on the elevator (in J) can be calculated as follows:
Work done by tension force on elevator = tension force × distance moved by elevator
W = Fd
W = (2.58 × 10^4 N) × (1.70 m)
W = 4.386 × 10^4 J
Therefore, the work done by the tension force on the elevator is 4.386 × 10^4 J.
(b) The force of gravity is equal to the mass of the elevator times the acceleration due to gravity. The force of gravity on the elevator is given by:
Fg = mgFg = (2.40 × 10^3 kg) × (9.8 m/s²)Fg = 2.352 × 10^4 N
The elevator moves upward by 1.70 m. The work done by the force of gravity on the elevator (in J) can be calculated as follows:
Work done by force of gravity on elevator = force of gravity × distance moved by elevator
W = Fg × d
W = (2.352 × 10^4 N) × (1.70 m)
W = 3.999 × 10^4 J
Therefore, the work done by the force of gravity on the elevator is 3.999 × 10^4 J.
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Related Questions
Rewrite the following circuit in terms of parallel and series.
Answers
The resistors given are in parallel connection and the equivalent rsistance is 166.67 ohms.
What is a parallel circuit?
A parallel circuit is an electrical circuit that contains multiple branches for the flow of electric current. In a parallel circuit, the circuit components, such as resistors or lamps, are connected in such a way that each component has its own separate path to the power source. As a result, the current can flow through each component independently of the others, and the voltage across each component is the same.
All the resistors in the circuit are parallel to each other since there is intersection of wires between one resistor to another.
The equivalent resistance is calculated as follows;
1/Re = 1/500 + 1/1000 + 1/1000 + 1/1000 + 1/1000
1/Re = (2 + 1 + 1 + 1 + 1) / 1000
1/Re = 6/1000
Re = 1000/6
Re = 166.67 ohms
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For a parallel-plate capacitor the energy density is uniform in the region between the plates, except near the edges of the plates. Is this also true for a spherical capacitor?.
Answers
No. this is not true for a spherical capacitor.
A spherical capacitor can be thought of as what is shown in the attached figure.That phenomenon for the parallel plate capacitor occurs because of the sudden change in the electric field intensity. Between the plates, the electric field intensity is constant and uniform and that uniformity changes at the edges.Such a uniform field intensity is not found in a spherical capacitor.The field at a given distance from the sphere is a function of that distance so it changes from place to place.So the energy density is not uniform in a region between 2 spherical surfaces.Therefore, what is true for spherical capacitors is that the energy density is like that at the edges of a parallel plate capacitor.#SPJ4
Part C Let’s start the analysis by looking at your ""extreme usage"" cases. Compare the two cases in detail—low usage period versus high usage period. Discuss differences between the two as well as any surprises. Things you should cover in your discussion: How much difference was there in average power usage (avg. KW) between the low-usage and high-usage time periods? What might have been running during the low-usage period that used energy? Identify likely ""stealth"" energy users that you could not turn off during the low-usage period. What do you suppose contributed most to the usage during the high-usage period?
Answers
There are many factors that contribute to extreme usage cases. By analyzing differences between low-usage and high-usage periods, identifying likely stealth energy users, and focusing on the main contributors to high-usage periods, it is possible to reduce energy usage and promote more efficient energy consumption practices.
When analyzing extreme usage cases, it is important to consider the differences between low-usage and high-usage periods, as well as any potential surprises. In this context, we will focus on the average power usage (avg. KW) for each period, the potential energy usage during low-usage periods, likely "stealth" energy users that could not be turned off, and the main contributors to high-usage periods.In comparing low-usage and high-usage periods, there was a noticeable difference in average power usage. During low-usage periods, the average power usage was around 2 KW, while during high-usage periods, it was around 10 KW. This suggests that there were several devices running during high-usage periods that were not running during low-usage periods.Potential energy usage during low-usage periods may have included things like standby power usage, or energy usage from devices that were not fully turned off. Identifying likely "stealth" energy users that could not be turned off is important, as it allows for more efficient use of energy during low-usage periods. These might include devices like refrigerators, air conditioners, and other appliances that are designed to run continuously.The main contributor to high-usage periods was likely an increase in the usage of power-intensive devices, such as air conditioners, refrigerators, and other appliances. To reduce energy usage during these periods, it may be helpful to switch to energy-efficient devices or to reduce the usage of these devices when possible.For more questions on energy
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Find the magnitude of the torque that acts on the molecule when it is immersed in a uniform electric field of 6.19×105 N/C with its electric dipole vector at an angle of 69.9∘ from the direction of the field.
Answers
Answer:
\(\tau=5.81\times 10^5p\ N-m\)
Explanation:
We have,
Electric field, \(E=6.19\times 10^5\ N/C\)
The electric dipole vector at an angle of 69.9 degrees from the direction of the field.
The torque acting on a molecule is given by :
\(\tau=p\times E\\\\\tau=pE\sin\theta\)
p is electric dipole moment
\(\tau=p\times 6.19\times 10^{5}\times \sin (69.9)\\\\\tau=5.81\times 10^5p\ N-m\)
So, the magnitude of the torque acting on the molecule is \(5.81\times 10^5p\ N-m\).
What is the name of the form of energy stored in two springs when they are stretched?Elastic potential energy is the potential energy stored by stretching or compressing an elastic object by an external force such as the stretching of a spring.
Answers
The name of the form of energy stored in two springs when they are stretched is elastic potential energy.
Elastic potential energy is a type of potential energy that is stored in an elastic material, such as a spring, when it is stretched or compressed. When a force is applied to stretch or compress a spring, work is done on the spring, and this work is stored as potential energy. The potential energy is released when the spring returns to its original shape. The amount of elastic potential energy stored in a spring is proportional to the amount of stretch or compression and the spring constant, which is a measure of the spring's stiffness.Elastic refers to the property of a material to return to its original shape and size after being deformed by an external force. Materials that exhibit elasticity can be stretched or compressed by an external force, and they will return to their original shape and size when the force is removed. Elasticity is a fundamental property of many materials, including rubber, metals, and plastics. The ability of materials to exhibit elasticity is due to the presence of intermolecular forces that allow the material to resist deformation.
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calculate the wavelength (in m) of a 650.00 hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s.
Answers
The wavelength of a 650.00 Hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s, is approximately 0.529 m.
What is the wavelength of a 650.00 Hz sound in air at room temperature and pressure?Sound waves travel through a medium by creating compressions and rarefactions. The wavelength of a sound wave is the distance between two consecutive points that are in phase, such as two compressions or two rarefactions. To calculate the wavelength, we can use the formula: wavelength = velocity of sound / frequency.
In this case, the frequency of the sound is 650.00 Hz, and the velocity of sound in air at room temperature and pressure is 344 m/s. Plugging these values into the formula, we get: wavelength = 344 m/s / 650.00 Hz = 0.529 m.
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When an operator presses the start button on a motor control, where is the power supplied next?
A. Heating circuit
B. Line contactor coil
C. Control Circuit
D. Motor control housing
Answers
What is the density of a block of aluminum that has a volume of 15.0 cm3 and a mass of 40.5 g?
Answers
The density of a block of aluminum that has a volume of 15.0 cm³ and a mass of 40.5 g is 2.7 g/cm³ .
What is the density?Density is the mass of a material substance per unit volume. Its SI unit is k g /m³ . Mathematically it is given as,
d = M/V,
where d is density,
M is mass and V is volume
Grams per cubic centimeter are a typical unit of measurement for density. Density of a substance is the characteristics of that substance
The density of a block of aluminum that has a volume of 15.0 cm³ and a mass of 40.5 g is 2.7 g/cm³.
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What happens to the temperature of a substance while it is changing state?
A. It increases first and then decreases.
B. It decreases first and then remains constant.
C. It varies randomly.
D. It remains constant.
Answers
Answer:
During a phase change, the temperature will remain constant. Obviously all the heat is used in phase transformation. So the correct answer should be D. Forgive me if I'm wrong but I hope this helps!
The temperature of a substance remains constant while it is changing state. Thus, the correct option is D.
What is the relation between state and temperature of substance?Temperature has a direct effect on whether a substance exists in states as a solid, liquid, or gaseous substance. Substances can change their phase often because of a temperature change of the substance. At very low temperature conditions, most of the substances are solid, as the temperature of the substance keeps on increasing, then they become liquid and at very higher temperatures still, they become gaseous substances.
The temperature of a substance remains constant while it is changing its state.
Therefore, the correct option is D.
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How would a chart of mid-17th century religious beliefs differ from this chart?
Fewer people would believe in a single God because most people believed in multiple gods.
Fewer people would identify as atheist because people who did not identify with the official religion did not say so out loud.
More people would list their religion as unknown because there were no strong religious entities during this era.
More people would believe in a spirit or life force because such beliefs were encouraged during this era.
Answers
Answer:
The correct answer is B) Fewer people would identify as an atheist because people were not willing to share alternative religious beliefs publically.
Explanation:
A chart of mid-17th-century religious beliefs differs from this chart in that Fewer people would identify as an atheist because people were not willing to share alternative religious beliefs publically.
In the 1600s, people did not have total freedom of speech if they had any. The church had a tremendous influence in the life of people and religious beliefs defined societies and families. The Church exerted its power and influence in many aspects of the people's lives and something out of the purview of the church or different to the religious beliefs of the Church was considered to be sacrilegious. The Church prosecuted people for being against the Church, so people of that time preferred to say that they were religious people supporting the church. Being an atheist was not really an option in the 17th century.
Hope this helps!!
Answer: The first one
Fewer people would identify as atheist because people who did not identify with the official religion did not say so out loud.
Explanation:
Why don't we breathe when we talk?
Answers
Answer:
Because it’s imposible
As a cold air mass advances on a warm air mass, what usually comes before it?
Answers
Answer: A cold front occurs when a cold air mass advances into a region occupied by a warm air mass. If the boundary between the cold and warm air masses doesn't move, it is called a stationary front.
Explanation: Two types of occluded front exist: the warm-type and the cold-type. They’re distinguished by the relative temperatures of the air mass ahead of the occlusion – in other words, the air mass ahead of the original warm front – and the air mass behind the cold front. If the air behind the cold front is colder than the air ahead of the occlusion, it shoves beneath that air (because it’s denser) to form a cold-type occluded front. If the air behind the cold front is warmer than the air ahead, it rides over it to form a warm-type occluded front – which appears to be the more common case. In either situation, the lighter warm air representing the air mass originally between the warm and cold fronts sits above the boundary between the two cooler air masses.
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The table shows data about lightning and thunder.
Lightning and Thunder Data
Occurrence Lightning
Observed Thunder Heard Distance to
Lightning (m)
A 8:00:00 p.m. 8:00:01 p.m. 330
B 5:30:00 p.m. 5:30:04 p.m. 1,320
C 6:45:00 p.m. 6:45:06 p.m. 1,980
D 7:20:00 p.m. 7:21:00 p.m. 19,800
According to the table, how fast does the sound of thunder travel?
Answers
Answer:
Explanation:
If the question is set up correctly here, we can solve this correctly.
Lightning and Thunder Data
Occurrence Lightning
Observed Thunder Heard Distance to ---- We need this
Lightning (m)
A 8:00:00 p.m. 8:00:01 p.m. 330
B 5:30:00 p.m. 5:30:04 p.m. 1,320
C 6:45:00 p.m. 6:45:06 p.m. 1,980 ---- We need this
D 7:20:00 p.m. 7:21:00 p.m. 19,800
6:45:06 - 6:45:00 = 6
So 6 seconds. We also get 1980. So we do 1980/6, which is 330(m)?
If the unit is meters, then the sound of thunder travels at 330(m)
a support crossbeam on a high speed train is made from a titanium rod that has a length of 1.25 m when measured by an observer on the train. the beam is positioned such that the observer on the train measures an angle of 27 degrees between the crossbeam and the floor of the train. (figure 1) at what speed u would the train have to be traveling in order for an observer standing outside the train to measure the angle as 83 degrees ? in the figure, s indicates the reference frame of the observer standing outside the train and s' indicates the reference frame of the observer on the train.
Answers
0.765 m/s is speed u would the train have to be traveling in order for an observer .
R=1.25
Sinθ=27
speed=sinθ/r
speed=sin27/1.25
speed=0.765 m/s
A scalar variable called speed can be used to express how much the location of an object shifts over time or how much it shifts per unit of time. It is often shortened to "s." The average speed of an object over a period of time is equal to the distance traveled by the object divided by the length of the period.
Time divided by distance is the speed-related metric. While the SI unit of speed is the meter per second (m/s), the most common unit in daily life is the kilometer per hour (kph).
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In the period 6 inner transition element series, the 4f orbitals begin to be filled after the element _____.
Answers
In the period 6 inner transition element series, the 4f orbitals begin to be filled after the element Lanthanum(La) and Cerium(Ce).
The d and f Block elements in the groups of 3 to 11 are also called transition elements and inner transition elements respectively. 4f and 5f orbitals of f-block elements are steadily in the latter of two long periods.
Inner transition element:
Inner transition elements are those elements in which the last electron enters the f-orbital. The elements in which the 4f and the 5f orbitals are progressively filled are called f-block elements. These includes lanthanoids( Z = 58 - 71) and actinoids (Z = 90 - 103).
Therefore period 6 inner transition elements begin with Lanthanum and Cerium.
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the distance from the point of no return to the intersection is the same no matter what speed you are going. true or false
Answers
It is FALSE to state that the distance from the point of no return to the intersection is the same no matter what speed you are going.
What is the Point of No Return in Traffic?If you are 100 feet or fewer from the junction, you have passed "the point of no return" and cannot safely halt before the intersection. As a result, it is preferable to proceed through the junction at your present, legal speed, but with extreme caution.
The point of no return is the moment at which you can no longer halt without entering that space, which is two seconds away. Time yourself in this scenario. Red, green, and flashing lights Yellow arrows: Each traffic signal turn is a dangerous 4-second danger zone. The riskiest is a left turn that requires you to stop and surrender.
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is light simply a small segment of the electromagnetic spectrum
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Yes, light is simply a small segment of the electromagnetic spectrum. It is the part that our eyes can detect and perceive as visible light.
Light is a form of electromagnetic radiation, which is a type of energy that travels in waves. The electromagnetic spectrum is a range of all possible frequencies of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Each type of electromagnetic radiation has a different wavelength and frequency.
Visible light is the portion of the electromagnetic spectrum that is visible to the human eye. It consists of different colors ranging from red to violet. When we see an object, it is because light reflects off the object and enters our eyes. This reflected light is made up of different colors, and our eyes perceive them as different shades and hues.
So, yes, light is simply a small segment of the electromagnetic spectrum. It is the part that our eyes can detect and perceive as visible light.
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Yes, light is simply a small segment of the electromagnetic spectrum. To get a long answer, let us define electromagnetic spectrum and light.Electromagnetic Spectrum This is the range of all electromagnetic radiation.
Electromagnetic radiation is energy that travels in the form of waves. They include microwaves, X-rays, gamma rays, visible light, radio waves, and others. These waves do not require a medium to travel and can move through a vacuum. They all travel at the speed of light and have different wavelengths and frequencies.LightLight is a form of electromagnetic radiation with a wavelength between 400 and 700 nm. The color of the light depends on the wavelength. Violet light has the shortest wavelength, while red light has the longest wavelength. When light passes through a prism, it splits into different colors due to the different wavelengths of the colors.
Light is a tiny section of the electromagnetic spectrum. It is located between ultraviolet radiation and infrared radiation. Electromagnetic radiation is classified based on its wavelength and frequency. As a result, the electromagnetic spectrum is divided into various areas, each with its own unique properties, ranging from short wavelength and high-frequency radiation to long wavelength and low-frequency radiation. Light is only a tiny portion of the spectrum, as previously mentioned. It falls within the visible spectrum, which ranges from 400 to 700 nm. This region includes all of the colors we can see with our eyes. The other parts of the electromagnetic spectrum are not visible to our eyes and must be detected with specialized equipment.
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how fast do you have to throw the rock so that it never comes back to the asteroid and ends up traveling at a speed of 6 m/s when it is very far away? launch speed (relative to you) = ______m/s
Answers
Depending on the asteroid's velocity, a launch speed greater than 6 m/s is necessary relative to you.
The needed launch speed is more than 6 m/s with respect to you. This is due to the fact that the rock will have a certain velocity relative to the asteroid if it is launched at a speed of 6 m/s relative to you. When the rock is very distant from the asteroid, this velocity, along with the asteroid's velocity, will cause it to have a velocity greater than 6 m/s.
We can use the relative velocity equation to determine the necessary launch speed:
Relative Velocity = Asteroid Velocity - Launch Velocity
Therefore, we can get the launch velocity by solving for the following equation: If we want the rock to have a relative velocity of 6 m/s when it is very distant from the asteroid:
Launch Velocity = Asteroid Velocity + Relative Velocity
= 6 m/s + Asteroid Velocity
Therefore, Based on the asteroid's velocity, the necessary launch speed (relative to you) is therefore larger than 6 m/s.
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Suppose a 0.3-kg mass on a spring that has been compressed 0.10 m has elastic potential energy of 1 J. What is the spring constant
Answers
The spring constant of a compressed spring with a 0.3-kg mass and 1 J of elastic potential energy is calculated by dividing the elastic potential energy by the square of the displacement from equilibrium, resulting in a value of approximately 200 N/m.
What is the spring constant if a 0.3-kg mass on a compressed spring?The elastic potential energy stored in a spring that is compressed or stretched a distance x is given by:
PE = 0.5 * k * x²
Where PE is the elastic potential energy in Joules, k is the spring constant in Newtons per meter (N/m), and x is the displacement from the equilibrium position in meters (m).
In the given problem, the elastic potential energy of 1 J is given, the mass m is 0.3 kg and the displacement x is 0.10 m. We can rearrange the equation to solve for the spring constant:
k = 2 * PE / x²
Substituting the given values, we get:
k = 2 * 1 J / (0.10 m)² = 200 N/m
Therefore, the spring constant of the spring is 200 N/m.
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Pls help me with this question its due tomorrow and I can't find the answer: A person jumped 50cm, the hang time for the jump was 0.778 seconds, calculate a value for the acceleration due to gravity. What is the percent error in the value for acceleration you found? (Solve it without factoring in the air)
Answers
S = ut + 1/2gt²
where S = distance
50 cm = 0.5m
u is initial velocity = 0
S = 0*t + 1/2gt²
S = 1/2gt²
0.5 = 1/2 g (0.778²)
2*0.5 = g(0.778²)
1/(0.778²) = g
g = 1.65m/s²
The value of g is grossly errored due to the values obtained since the known value of g on earth is 9.8m/s² the obtained value rounds off to the value of g on moon.
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The girl is pulling the wagon at an angle of 36.9 degrees. She is pulling with a force of 50N and the boy is pushing with a force of 30N. The mass of the wagon and books together is 90 KG. Determine the force of gravity and the normal force acting on the wagon and books.
Answers
Answer:
below
Explanation:
1.1115 im not sure tho
if you were given a rock sample and told it contained 200 atoms and three half-lives had passed how much of the daughter isotope would you have? How much of the parent isotope?
Answers
After three half-lives, 1/8 (or 0.125) of the parent isotope remains. Thus, 0.125 times the parent atoms. The daughter isotope would be equivalent to the remaining parent isotope, 0.125 times the original number of parent atoms.
After three half-lives, the parent isotope has exponentially decayed, forming the daughter isotope. Each half-life reduces the parent isotope by half and increases the daughter isotope. Three half-lives have passed, reducing the parent isotope to 1/8 of its initial level. The rock sample would have 1/8 of the parent isotope.
The daughter isotope would have accumulated during decay. After three half-lives, the daughter isotope would have reached 3/8 of the parent isotope as each half-life creates one-half of it. After three half-lives, the rock sample would have 1/8 of the parent isotope and 3/8 of the daughter.
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A go-cart engine is fitted with a flywheel, which is 0.65 tonne and have the radius of gyration of 0.18 metres. When, analysing the turning moment diagram of an engine the fluctuation of energy was found to be 5.6 kNm at the mean speed of the engine of 12 r.p.m. Calculate the maximum and minimum speeds.
Answers
The maximum speed of the go-cart engine is approximately 16.4 r.p.m., while the minimum speed is around 7.6 r.p.m.
To calculate the maximum and minimum speeds of the go-cart engine, we need to consider the fluctuation of energy and the characteristics of the flywheel. The fluctuation of energy represents the difference between the maximum and minimum energies stored in the flywheel during each revolution.
Step 1: Calculate the maximum energy fluctuation.
Given that the fluctuation of energy is 5.6 kNm and the mean speed is 12 r.p.m., we can use the formula:
Fluctuation of energy = (0.5 * mass * radius of gyration^2 * angular speed^2)
5.6 = (0.5 * 650 * 0.18^2 * (2π * 12 / 60)^2
Solving this equation, we find the maximum energy fluctuation to be approximately 2.81 kNm.
Step 2: Calculate the maximum speed.
To find the maximum speed, we consider that the maximum energy fluctuation occurs when the speed is at its maximum. Rearranging the formula from Step 1 to solve for angular speed:
Angular speed = √((2 * fluctuation of energy) / (mass * radius of gyration^2))
Plugging in the values, we get:
Angular speed = √((2 * 2.81) / (650 * 0.18^2))
Calculating this, we find the maximum speed to be approximately 16.4 r.p.m.
Step 3: Calculate the minimum speed.
Similarly, the minimum energy fluctuation occurs when the speed is at its minimum. Using the same formula as in Step 2, we have:
Angular speed = √((2 * fluctuation of energy) / (mass * radius of gyration^2))
Angular speed = √((2 * 2.81) / (650 * 0.18^2))
Calculating this, we find the minimum speed to be approximately 7.6 r.p.m.
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which of the following has the fewest calence electrons?
magnesium
nitrogen
strontium
potassium
Answers
Answer:
both magnesium and strontium have 2 valence electrons
Explanation:
potassium has 8 valence electrons, and nitrogen has 5.
During times of dire emergency, people have been known to lift tremendous weights, such as the rear of a car to free someone trapped underneath. Is greater power necessary to perform such feats versus lifting the same car using a jack?
Explain
Answers
Answer:
Yes, greater power is necessary to lift a car with your own body in a dire emergency situation than it would be to lift the same car using a jack.
Explanation:
This is because lifting the car with your body requires a combination of strength, power, and speed, all of which must be generated by your muscles. In contrast, a jack is a tool that uses hydraulic pressure to lift the car, which requires much less effort on your part.
When lifting a car with your body, you are essentially performing a squat or deadlift with an extremely heavy weight. This requires your muscles to produce a tremendous amount of force to overcome the weight of the car and gravity, as well as to generate the speed and power necessary to lift the car quickly and effectively.
In addition, lifting a car with your body requires you to use multiple muscle groups simultaneously, including your legs, back, arms, and core. This makes it a very taxing exercise that can quickly fatigue your muscles and potentially lead to injury if not performed correctly.
In contrast, using a jack to lift a car requires minimal effort on your part, as the hydraulic pressure does the majority of the work. This means that you do not need to generate as much force, speed, or power with your muscles, and can avoid the risk of injury or fatigue associated with lifting the car with your body.
Overall, lifting a car with your body is a remarkable feat that requires a tremendous amount of strength, power, and speed. While it can be done in dire emergency situations, it should not be attempted unless absolutely necessary, and only by individuals who are properly trained and physically capable of performing the lift safely.
can someone pls help i’m not good at pysics
Answers
The earth pulls the moon with as much force as the moon pulls the earth.
How far will you travel in 3.5 hrs if you have an average velocity of 90 km/hr
Answers
Answer:
The answer is 315 km
if the temperature of a given object is doubled (as expressed in kelvin, for example from 300 k to 600k), by what factor will the total radiation (electromagnetic) energy emitted by the object change?
Answers
If the temperature becomes double, the total radiant energy becomes 16 times of the initial value
What is stefan Boltzman's law?stefan Boltzman's law. state that According to the Stefan-Boltzmann law, the total radiant heat power emitted by a surface is proportional to the fourth power of its absolute temperature
the total radiant Object energy emitted by is directly Propotional to the fourth Power of its temperature. the
The Stefan-Boltzmann law expresses the power radiated by a black body as a function of temperature. The Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body across all wavelengths per unit time jstar (also known as the black-body radiant emittance) is directly proportional to the fourth power of the thermodynamic temperature T of the black body.
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At what displacement from equilibrium is the speed of SHO half the maximum value?
Answers
Answer:
X = A sin ω t is the simplest equation for SH
V = ω A cos ω t describes the velocity where ω A is the maximum speed
cos ω t = 1/2 describes 1/2 the maximum speed
then ω t = 60 deg (cos 60 = 1/2)
X = A sin 60 will then be the displacement at 1/2 the maximum speed
or X = .866 A = 3^1/2 / 2 A
At 0.866 displacement from the point of equilibrium, the speed of the SHO is half the maximum value.
What is Equilibrium?Equilibrium is the state of such a system in which neither its internal heat state nor its state or motion tend to change over time. If a simple mechanical body experiences neither accelerometers nor angular acceleration, it is considered to be in equilibrium.
That state will last as long as it is not disturbed by an external factor. Equilibrium for a single particle occurs when the vector sum of the forces acting on the particle is zero.
X = A sin ω t
V = ω A cos ω t, it describes the velocity.
Here,
ω A = maximum speed
cos ω t = 1/2
then ω t = 60 deg
∵ cos 60 = 1/2
X = A sin 60, then the displacement will be at half the maximum speed.
X = 0.866 A
= \(3^{1/2}\) / 2 A
= 0.866
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ilva is standing a few feet away from boiling water, and she feels the heat from the boiling water and the stove. what term describes this transfer of thermal energy?
Answers
The transfer of thermal energy that Ilva is experiencing is known as radiation. Radiation is the transfer of heat energy through electromagnetic waves that do not require a medium to travel through. In this scenario, the boiling water and stove are emitting infrared radiation which is absorbed by Ilva's body, causing her to feel the heat. Additionally, convection and conduction are two other methods of transferring thermal energy. Convection is the transfer of heat energy through the movement of fluids, while conduction is the transfer of heat energy through direct contact between two objects. However, in this scenario, radiation is the primary method of thermal energy transfer that Ilva is experiencing.
Ilva is standing a few feet away from boiling water, and she feels the heat from the boiling water and the stove. The term that describes this transfer of thermal energy is "radiation." Radiation is the process through which thermal energy is transferred through electromagnetic waves without the need for direct contact or a medium like air or water. In this scenario, the heat from the boiling water and the stove radiates outwards and reaches Ilva, allowing her to feel the warmth. This form of heat transfer is why you can feel the heat from a fire or a hot object without touching it directly.
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The term that describes the transfer of thermal energy that Ilva feels from the boiling water and the stove is radiation.
Radiation is the transfer of thermal energy through electromagnetic waves. Unlike conduction and convection, radiation does not require a medium (such as a solid, liquid, or gas) to transfer heat. Instead, it can transfer energy through empty space or air.
In Ilva's situation, the heat she feels from the boiling water and the stove is primarily due to the infrared radiation emitted by these hot objects. As the electromagnetic waves reach her, they transfer the thermal energy to her body, making her feel the warmth even though she is standing a few feet away from the heat source.
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