If a 2 kg spring is compressed by exerting a force of 10 newtons a distance of 50 cm how much work is done?
Answers
50/100=0.5m
work done= 10x0.5
=5J
we dont consider the weight of the spring as it acts downwards.
Related Questions
is noise energy a kind of energy or not
Answers
which substance is the best transmitter of solar energy?
Answers
The substance that is the best transmitter of solar energy is glass.
Solar energy is an effective and renewable energy source that is harnessed in a variety of ways. In order to utilize solar energy in the most efficient way possible, it is necessary to determine which substance is the best transmitter of this energy. Among all substances, glass is the best transmitter of solar energy. Glass is transparent, which means that it allows sunlight to pass through it. In fact, it transmits about 90% of the sunlight that falls on it. Glass also traps the remaining heat, which is why it is an ideal material for greenhouses and solar panels. A greenhouse is a structure that is built with glass walls and roofs in order to grow plants. The glass walls and roofs trap the sunlight, which heats up the inside of the greenhouse. This allows plants to grow in a controlled environment that is not affected by changes in the weather. A solar panel is a device that converts sunlight into electrical energy. The solar panel is made up of photovoltaic cells, which are made of silicon and other materials that absorb sunlight. When the sunlight is absorbed by the photovoltaic cells, it creates an electric current that can be used to power a variety of devices.
In conclusion, glass is the best transmitter of solar energy. It transmits about 90% of the sunlight that falls on it and traps the remaining heat, making it an ideal material for greenhouses and solar panels. By using glass, we can harness the power of the sun in a variety of ways that are efficient, effective, and environmentally friendly.
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On a weed-cutting device, a thick nylon line rotates on a spindle at 3000 rpm.
a. Determine the angular speed.
b. Determine the linear speed (to the nearest inch per minute) of a point on the tip of the line if the line is 5 in.
Circular Motion:
How fast a body turns is defined by its angular speed (ω)
and how fast that same body is moving along its circular path is called linear or tangential speed (vt). The angulr speed is measured in radians per second or the product of 2π and the frequency (f). While the linear speed is the product of the angular speed and the radius (r).
Answers
a. The angular speed of the rotating nylon line is 314.16 radians per minute.
b. The linear speed of a point on the tip of the line is approximately 2617 inches per minute.
a. What is the angular speed of the rotating nylon line?The angular speed of the rotating nylon line can be determined by converting the rotational speed from revolutions per minute (rpm) to radians per minute.
Since one revolution is equal to 2π radians, the angular speed is calculated as 3000 rpm multiplied by 2π, resulting in approximately 314.16 radians per minute.
b. How fast is a point on the tip of the line moving in inches per minute?To find the linear speed of a point on the tip of the line, we need to multiply the angular speed by the radius of the circular path. Given that the line is 5 inches long, the radius is half of that, or 2.5 inches.
The linear speed can be obtained by multiplying the angular speed of 314.16 radians per minute by the radius of 2.5 inches, resulting in approximately 785.4 inches per minute.
Rounding to the nearest inch per minute, the linear speed of a point on the tip of the line is approximately 2617 inches per minute.
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Describe some tests that could be done to determine what an unknown substance is.
Answers
Answer:
by finding melting and boiling points
Explanation:
Answer:
Simple chemical tests can be used to identify the presence of various elements or classes of molecules (Tollen's test). ... Electron spin resonance (ESR): Also referred to as electron paramagnetic resonance (EPR), this method uses the spins of unpaired electrons in molecules to determine structure
an object with a mass of 16.6 kg is accelerated in a straight line from rest to 8.47 m/s in 7.69 seconds. what is the magnitude of the average force in newtons exerted on the object
Answers
An object with a mass of 16.6 kg is accelerated in a straight line from rest to 8.47 m/s in 7.69 seconds. The magnitude of the average force exerted on the object is 18.26 Newtons
To find the magnitude of the average force exerted on the object, we can use the formula
F = m * a,
where F is the force, m is the mass, and a is the acceleration.
First, we need to find the acceleration (a) using the formula a = (final velocity - initial velocity) / time.
In this case, the initial velocity is 0 m/s (since the object is at rest), the final velocity is 8.47 m/s, and the time is 7.69 seconds. So the acceleration (a) is:
a = (8.47 - 0) / 7.69 = 1.1 m/s²
Now, we can find the force (F) by multiplying the mass (16.6 kg) by the acceleration (1.1 m/s²):
F = 16.6 * 1.1 = 18.26 N
Therefore, the magnitude of the average force exerted on the object is 18.26 Newtons.
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How can you use a screen to
determine whether an image is real or virtual?
Answers
A scientist designed a foam container to help keep frozen foods from melting. Which best explains how the foam works? It removes thermal energy from the air inside the container. It removes thermal energy from the frozen foods inside the container. It reduces the amount of thermal energy that is transferred from inside to outside the container. It reduces the amount of thermal energy that is transferred from outside to inside the container.
Answers
Answer:
The answer is D
Explanation:
It reduces the amount of thermal energy that is transferred from outside to inside the container.
hope this helps
may i have brainliest pls
The foam reduces the amount of thermal energy that is transferred from outside to inside of the container, which prevents frozen food from melting. Thus, option D is correct.
What is thermal energy?Thermal energy is the energy present in the system that mainly depends on its temperature. Heat is the flow of thermal energy. When temperature increases in the system, the vibration of molecules increases more heat energy is released.
It is also defined as the transfer of heat energy between the systems and also the work done in the transfer of heat. When a substance is changed from one state to another state of matter, heat energy is released.
The material that prevents the heat (thermal energy) passes through them is called a thermal insulator. A foam is considered a good insulator and it is used to prevent frozen food from melting.
Foam is a thermal insulator that prevents heat flow and reduces the amount of thermal energy that is transferred from outside to inside the container.
Hence, the ideal solution is option D.
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a pendulum is swinging in a stationary elevator with period t. when the elevator accelerates upwards, what happens to the period of oscillation?
Answers
When acceleration increases, then the period of motion decreases. As, the relation between acceleration and period of motion (oscillation) is inversely proportional
T=1/2π × √1L/g+a
How to know the oscillation of an elevator?Inside the moving lift
T=1/2π × √L/g+a
T= period pf motion (oscillation)
L= is the length of the pendulum
a= acceleration of the elevator
When the elevator accelerates in the upward direction, then the effective acceleration of the pendulum is equal to the sum of acceleration due to gravity and the acceleration of the elevator, therefore,
T=2π√L/g
So, if acceleration increases, then
T=2π√L/g+a
Therefore, effective acceleration increases and this results in a decrease in the period of motion.
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TRUE or FALSE: During a collision between objects of different mass, there is a greater force applied to the less massive object.
Answers
Calculate the momentum of a 4,800 kg car with a velocity of 25 m/s.
Answers
Answer:
p = 120000 kg · m/s
Explanation:
p = mv
p=momentum
m=mass
v=velocity
p = (4800)(25)
p= 120000 kg · m/s
Answer:
\(momentum = mass \times velocity \\ = 4800 \times 25 \\ = 120000 \: kgm {s}^{ - 1} \)
calculate the weight of a 4.3 kg bunny WITH PROOF/WORK
Answers
Answer:
can you be more specific? The answer is in the question. The bunny weighs 4.3 kg lol.
Explanation:
If you're looking for kg to lbs, then 4.3 kg is about 9.4lbs
A 0.55 kg football is kicked off the tee with a force of 18 newtons. If the football reaches a speed of 8.0 m/s, how long was that force applied?
Answers
The force was applied to the football for approximately 0.244 seconds.
To find the duration for which the force was applied to the football, we can use Newton's second law of motion, which states that the force acting on an object is equal to the product of its mass and acceleration.
The formula for force is:
F = m * a
where F is the force, m is the mass, and a is the acceleration.
In this case, the force applied to the football is 18 newtons, and the mass of the football is 0.55 kg.
Now, we need to find the acceleration of the football. We can use the formula for acceleration:
a = (v - u) / t
where v is the final velocity, u is the initial velocity, and t is the time.
Given:
Initial velocity (u) = 0 m/s (the football is initially at rest)
Final velocity (v) = 8.0 m/s
Substituting the given values into the equation for acceleration, we can solve for a:
a = (8.0 m/s - 0 m/s) / t
a = 8.0 m/s / t
Now, we can substitute the known values into Newton's second law to solve for time:
F = m * a
18 N = 0.55 kg * (8.0 m/s / t)
Simplifying the equation:
18 N = 4.4 m/s^2 / t
To isolate t, we can rearrange the equation:
t = 4.4 m/s^2 / 18 N
Calculating this expression, we find:
t ≈ 0.244 seconds
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2. (01.02)
Choose the best definition for the following phrase: like terms (1 point)
Options:
A Letter that holds the place for some unknown value in mathematics.
A process where you must look for terms that have identical variable parts and then combine their coefficient
A process where if two things are equal, one can be put in the place of the other and nothing will change
Terms that have identical variable parts
Answers
Answer:
A process where you must look for terms that have identical variable parts and then combine their coefficient.
A 15 kg mass weighs 60 N on planet X. The mass is allowed to fall freely from rest near the surface of the planet.
What is the acceleration due to gravity on planet X?
Enter your answer in the box. Your answer must be a whole number. DO NOT include any decimals.
Answers
Answer:
The answer to your question is 2
The weight we experience on our planet is the product of our mass and acceleration due to gravity. This is the force by our own weight. if an object of 15 kg mass weighs 60 on planet X, acceleration due to gravity on planet X will be 4 m/s².
What is gravitational force?Gravitational force is an attractive force by which an object attracts other objects into its center of mass. We are all standing on the surface of earth due to the gravitational pull of earth.
Gravitational force is directly proportional to the mass of the object and inversely proportional to the distance from the ground. Acceleration due to gravity is the acceleration of a moving body against the gravitational filed.
Given that the mass of the object is 15 Kg and the gravitational force or weight is 60 N. Then the acceleration due to gravity a is the ratio of its weight to the mass.
a = w/m
= 60 N/ 15 Kg
= 4 m/s².
Therefore, the acceleration due to gravity of the planet x is 4 m/s².
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like ______ lines are thick lines that define solid objects or boundaries.
Answers
Like contour lines, thick lines are used to define solid objects or boundaries.
Contour lines are typically used in drawing or painting to show the outline or shape of an object, and they can also be used to convey depth or distance. These lines are often referred to as tranches, highs, or horizontal highs. On the map this line connects places that are very high and a ground level on the map.
Thick lines are often used in technical drawings, such as architectural or engineering plans, to show the boundaries of an object or space. This line is used to carry out the creation of outlines, drawing lines and also real lines. Both types of lines are important tools for artists and designers, as they help to create a sense of structure and form in a composition.
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vehicles with traction control system have an advantage in rear wheel skids. by accelerating gently, the tcs will kick in and assist in regaining steering.
Answers
Vehicles with a traction control system (TCS) do have an advantage in rear wheel skids. When the TCS detects a loss of traction in the rear wheels, it kicks in and assists in regaining steering control.
By accelerating gently, the TCS is more likely to engage and help prevent the skid. This is because the TCS monitors the rotation speed of each wheel and applies brake pressure to the slipping wheel(s) to regain traction. Additionally, the TCS may also reduce engine power to prevent the wheels from spinning excessively. Overall, the TCS helps to improve the vehicle's stability and control in slippery or skidding situations.
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What is the specific heat capacity of a 250g object that needs 34.125kJ to have its own temperature raised by 65.0∘C
Answers
Answer:
Specific heat capacity, = 2.1J/g°C
Explanation:
Given the following data;
Mass = 250g
Quantity of heat = 34.125kJ = 34.125 * 1000 = 34125 Joules.
Change in temperature = 65.0∘C
To find the specific heat capacity;
Heat capacity is given by the formula;
\( Q = mcdt\)
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making c the subject of formula, we have;
\( c = \frac {Q}{mdt} \)
Substituting into the equation, we have;
\( c = \frac {34125}{250*65} \)
\( c = \frac {34125}{16250} \)
Specific heat capacity, = 2.1J/g°C
which phrase describes what a scientist does? A.Tells People how they should behave B .Answers ethical questions C. Ask questions about the world D. Determines right from wrong
Answers
Answer:
C. Ask questions about the world
Explanation:
A scientist is a person who conducts scientific research and provide scientific proves on the area of their interest such as physica, chemistry, biology or history.
A scientist gives the answers of the question about the world based on their scietifc research such as how does plant breath? effects of global warming on earth? what if we don't drink water for a particular time period? et-cetera.
Hence, the correct option is "C. Ask questions about the world".
Which of these statements describes protons and electrons?
Answers
The correct option is: "none of these statements is true".
To find out the correct option among all the options, we need to know more about the electron and proton.
What is electron?Electron is the fundamental particle of an atom.It is negatively charged.It is also a quantum particle. So, it can't stay at a place according to uncertainty principle i.e. it can move. What is proton?Proton is a fundamental particle of an atom present inside the nucleus.It's positively charged.It can move.Thus, we can conclude that the option (e) is correct.
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A 74.0 kg person climbs stairs, gaining 2.10 meters in height. Find the work done (in J) to accomplish this task
Answers
The work done by the person to climb the stairs is approximately 1521.72 Joules.
To find the work done by a person while climbing stairs, we can use the equation:
Work = force * distance * cos(theta)
where force is the force applied by the person, distance is the vertical distance climbed, and theta is the angle between the force applied and the direction of motion.
In this case, the force applied by the person is equal to their weight, which can be calculated using the equation:
force = mass * acceleration due to gravity
\(force = 74.0 kg * 9.8 m/s^2\)
force = 725.2 N
The distance climbed is given as 2.10 meters.
The angle theta is 0 degrees since the force applied by the person is in the same direction as the motion.
Now we can calculate the work done:
Work = 725.2 N * 2.10 m * cos(0°)
Work = 725.2 N * 2.10 m * 1
Work = 1521.72 J
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Un móvil se encuentra en la posición inicial x0 = 22 m, y se mueve con velocidad 5 m/s. Calcula la posición en la que se encuentra en el instante t = 30 s.
Answers
Answer:
La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.
Explanation:
El movimiento rectilíneo uniforme (MRU) es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante.
La distancia recorrida, x , por un móvil que tiene un MRU con un velocidad v durante el intervalo de tiempo t es:
x= x0 + v*t
donde x0 es la posición inicial.
En este caso:
x0= 22 mv= 5 m/st= 30 sReemplazando:
x= 22 m + 5 m/s* 30 s
Resolviendo:
x= 22 m + 150 m
x= 172 m
La posición en la que se encuentra el móvil en el instante t = 30 s es 172 m.
A 100 W point source emits monochromatic light of wavelength 6000 A. Calculate the photon flux (in SI unit) at a distance of 5 m from the source. Given h=6.6×10^34 J s and C=3×10^8 ms^−1.
a. 10^15
b. 10^18
c. 10^20
d. 10^22
Answers
The photon flux at a distance of 5 m from the source is approximately 3.03 × 10²¹ s⁻, which is closest to option (d) 10²² .
How to calculate photon flux accurately?
The photon flux can be calculated using the formula:
Photon flux = Power / Energy of a single photon
The energy of a single photon can be calculated using the equation:
Energy = (Planck's constant * Speed of light) / Wavelength
Given:
Power (P) = 100 W
Wavelength (λ) = 6000 Å = 6000 × 10⁻¹⁰ m
Planck's constant (h) = 6.6 × 10⁻³⁴ J s
Speed of light (c) = 3 × 10⁸ m/s
First, let's calculate the energy of a single photon:
Energy = (h * c) / λ
Energy = (6.6 × 10⁻³⁴ J s * 3 × 10⁸ m/s) / (6000 × 10⁻¹⁰ m)
Energy = (1.98 × 10⁻²⁵ J m) / (6 × 10⁻⁶ m)
Energy = 3.3 × 10⁻²⁰ J
Now, let's calculate the photon flux:
Photon flux = Power / Energy
Photon flux = 100 W / (3.3 × 10⁻²⁰ J)
Photon flux = 3.03 × 10²¹ s⁻
Therefore, the photon flux at a distance of 5 m from the source is approximately 3.03 × 10²¹ s⁻, which is closest to option (d) 10²² .
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PLEASE HELP ON QUESTION!
I keep posting this will a lot of points but nobody sees it so ill try again lol
Please, only answer if you rlly know the answer for sure! :)
thanks
Answers
Answer:
b. momentum, mass
Explanation:
If you increase the mass of an object, the momentum of the object increases proportionally
Answer:
B is correct.
Explanation:
Please give me brainliest :)
A switch controls whether electricity flows in a circuit or not. In the figure given, S1, S2, S3
and S4 are switches. Under what case will the bulb glow? * (1 Point)
Answers
Electricity won't flow in a circuit if you don't. as a result of open switches.
Switches S2, S3, S4, or S1, S4 must be closed in order for electricity to flow.
With examples, define circuit.
A closed road or a line defining a boundary is what is meant by the term "circuit." The wires that include conductors and other parts that enable electricity to move along them are an example of a circuit. Circuit refers to the route travelled by a judge who holds office in many courts.
Which circuit goes by what name?Electric circuits can be divided into five main categories: closed circuits, open circuits, short circuits, series circuits, and parallel circuits. Let's study and comprehend in depth using examples, definitions, and symbols.
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What is the average speed of an object that travels 510 meters in 17 days?
a . 30 meters/day
b. 493 meters/day
c . 527 meters/day
d . 8670 meters/day
e . none of the above
Answers
To solve, you’d decide the total distance by the total days to get the total for one day
Question 56 Marks: 1 Sandwich and salad mixtures should be placed in shallow pans at a depth not greater than ______ to accelerate the rapid cooling of the food.Choose one answer. a. 3 inches b. 2 inches c. 5 inches d. 8 inches
Answers
Option b. Sandwich and salad mixtures should be placed in shallow pans at a depth or height not greater than 2 inches to accelerate the rapid cooling of the food.
Legitimate cooling of food is a fundamental part of food handling and is important to forestall the development of destructive microbes. Shallow dish cooling is a strategy used to quickly cool food things like sandwich and salad combinations. By utilizing shallow dish that are no more profound than 2 inches, the food is presented to rapidly more surface region and cools more.
While cooling food, it means quite a bit to cool it from 135°F to 70°F in something like two hours and from 70°F to 41°F or underneath inside four extra hours to stay away from the peril zone where microbes can quickly duplicate. Utilizing shallow container to cool food to the protected temperature zone all the more rapidly can assist with forestalling the development of hurtful microbes and decrease the gamble of foodborne ailment.
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Two cars are traveling at the same speed (100 km/hr). They are traveling in opposite directions. Do they have the same velocity? Why?
Answers
Explanation:
well its depends for example one car might be going down the hilll and the other up a hill and there the velocity can change between the cars because of gravity so one can be going faster and the other slower.
A 57 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.1 m/s. The acceleration of gravity is 9.8 m/s 2 . Find her altitude as she crosses the bar. Neglect air resistance, as well as any energy absorbed by the pole. Answer in units of m.
Answers
Answer:
Her altitude as she crosses the bar, h₂ is approximately 6.1 m
Explanation:
The given parameters of the motion of the pole vaulter are;
The mass of the pole vaulter, m = 57 kg
The speed with which the pole vaulter is running, u = 11 m/s
The speed of the pole vaulter when she crosses the bar, v = 1.1 m/s
The acceleration due to gravity, g = 9.8 m/s²
From the total mechanical energy, M.E. equation, we have;
M.E. = P.E. + K.E.
Where;
P.E. = The potential energy of the motion = m·g·h
K.E. = The kinetic energy of the motion = 1/2·m·v²
By the principle of conservation of energy, we have;
The change (loss) in kinetic energy, ΔK.E. = The change (gain) in potential energy, ΔP.E.
ΔK.E. = 1/2·m·(v² - u²)
ΔP.E. = m·g·(h₂ - h₁)
Where;
h₁ = The ground level = 0 m
h₂ = The altitude with which she crosses the bar
∴ 1/2·m·(v² - u²) = m·g·(h₂ - h₁)
(h₂ - h₁) = (v² - u²)/(2·g) = (11² - 1.1²)/(2·9.8) = 6.11173469388
h₂ = 6.11173469388 + h₁ = 6.11173469388 + 0 = 6.11173469388
h₂ = 6.11173469388
Her altitude as she crosses over the bar, h₂ ≈ 6.1 m.
Which of these objects has kinetic energy?
A ball moving through the air. incorrect answer
B ball sitting on a table. incorrect answer
C ball buried underground. incorrect answer
D ball sitting on the edge of a cliff.
Answers
Answer:
A it's moving
Explanation:
Answer:
A. A ball moving through the air
Explanation:
the james webb telescope took the clearest-ever photos of what famous celestial object 1,300 light years away?
Answers
The James Webb Space Telescope has taken photos of galaxy cluster SMACS 0723.
The James Webb Space Telescope (JWST) is a large, space-based observatory that will be the successor to the Hubble Space Telescope. It is named after James E. Webb, who served as the second administrator of NASA from 1961 to 1968 and played a key role in the Apollo program that landed astronauts on the Moon. JWST is a joint project of NASA, the European Space Agency (ESA), and the Canadian Space Agency (CSA) and is set to launch on December 18, 2021. It is designed to be the premier observatory of the next decade, studying every phase in the history of our universe, ranging from the first luminous glows after the Big Bang to the formation of galaxies, stars, and planetary systems.
The James Webb Space Telescope has taken photos of galaxy cluster SMACS 0723. It is expected to capture high-quality images of various celestial objects, including those 1,300 light years away.
The deepest, sharpest infrared image ever captured of the distant universe was revealed last night—a stunning display of the galaxy cluster SMACS 0723 delivered by the recently launched James Webb Space Telescope. Just a century ago scientists believed there was only one galaxy, but this image reveals thousands—all found in a tiny speck of sky comparable in size to a single grain of sand held on a finger at arm’s length by someone standing on the ground.
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