Answer:
Time taken = 2.444sec
Explanation:
Greetings !
Given values :-
Final velocity (Vf) =44km/hr =12.22m/s Initial velocity (Vi) = 0m/sAcceleration (a)= 5m/s²Required values:-
Time taken (t) =?Solution/ work-out:-
Firstly change the km/hr value to m/s
Then, recall the Velocity-Time Equation:
\(vf = vi \: + at\)
substitute known variables into the equation
\((12.22) = (0) + (5)t\)
Solve for time
\(t = 2.444sec\)
Hope it helps!!
A runner weighing 70 kg, moving at a speed of 8.8 m/s, rounds
a bend with a radius of 25 m. What is the centripetal force
needed to keep this runner on the curve?
a 250 N
b 100 N
C 217 N
d 158 N
Answer:
217 N
Explanation:
Answer:217N
Explanation:
Of the three sciences, physics, chemistry, and biology, the most complex is
A. physics because it involves many mathematical equations.
B. chemistry because there are so many possible combinations of atoms.
C. biology because it is based upon both the laws of chemistry and physics.
D. All three of these sciences are equally complex.
Answer:
I would probably say C to be completely honest
Explanation:
If you agree make sure to give me a like
Calcular la cantidad de solucion que se encuentra en un recipiente con 670 g de solvente y 22 g de soluto
Answer:
692 g
Explanation:
La fórmula para encontrar la solución de una mezcla química es agregar el soluto y el solvente juntos. Esto significa
Solución = solvente + soluto
Solución = 670 g + 22 g
Solución = 692 g
es así de simple, y espero que lo entiendas
50 joules of energy are transferred out of a system. The energy is lost through heat, mechanical, and electrical energy took up 15 j and electrical energy took up 10 j, how many joules were lost through heat energy?
Answer:
25 joules
Explanation:
Not sure I understood correctly but since 15 are taken up by mechanical energy and 10 are taken in by electrical, 50-10-15 would result in 25 joules which must belong to heat energy
In a ray diagram showing refraction, the incident ray and the refracted ray...
A.Create equal angles
B.Are on the same side of the line that separates the two media
C.Are on the opposite sides of the line that separates the two media
D. Are the same length
calculate the energy difference for a transition in the paschen series for a transition from the higher energy shell n
The energy difference between the given shell while transactions between paschen series statement (energy differnce)ΔE = 1.30eV
What is Paschen series?The Paschen series is a collection of emission lines from atomic hydrogen gas caused by the descent of electrons from an electron shell with n > 3 to an electron shell with n = 3.
An electron moves from a higher state to the n = 3 shell in the Paschen series of the hydrogen atom.
Assume that the electron's starting state is n = 8.
Now to calculate the energy difference we use the following formula:
ΔE = (1/\(n^{2}\)low − 1/\(n^{2}\)high)13.6eV
According to the given data:
n high =8
n low=3
so putting value on the above formula
ΔE = (1/\(3^{2}\)low − 1/\(8^{2}\)high)13.6eV
ΔE =(0.095)13.6eV
ΔE = 1.30eV
So,The energy difference between the given shell while transactions between paschen series statement (energy difference)ΔE = 1.30eV
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A measurement of a change
in distance over time
Explanation:
Speed is the rate of change of distance with time.what do you call a material which is capable of reducing friction when applied between moving parts?
Answer:
The material is called a Lubricant.
Hope it helps! ☺️
Which is a compound machine?
a broom
a screwdriver
a slide
a pair of scissors
A pair of scissors is an example of a compound machine. Thus, the correct option is D.
What is Compound machine?A device which usually combines two or more simple machines together to work is called a compound machine. An example of a compound machine is a scissor. In a scissor, the functionality of a scissor and another scissor combines to cut a sheet of paper or cloth. Numerous compound machines can be created through the use of the six basic simple machines with each other.
Compound machines are also called as the complex machines which can be used to do more difficult jobs than simple machines alone. The tasks performed by the compound machines cannot be done easily with that of simple machines.
Therefore, the correct option is D.
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A sample of hydrogen (H2) gas was collected over water at 60°C. If the total volume of gas collected was 55.6 mL and the atmospheric pressure was 1.1 bar, what mass (in g) of hydrogen gas was collected above the water? The vapour pressure of water at 60°C is 150 torr.
First, calculate the partial pressure of H2 by considering the total pressure:
\(P_{\text{tot}}=P_{H2}+P_{H20}\)where,
Ptot = 1.1bar
PH20 = 150Torr
Convert the previous values to atm:
Ptot = 1.1 bar = 1.085 atm
PH20 = 150 Torr = 0.197 atm
Then, for PH2 you obtain:
\(P_{H2}=P_{\text{tot}}-P_{H20}=1.085\text{atm-}0.197\text{atm}=0.888atm\)Next, use the following equation for ideal gases:
\(PV=\text{nRT}\)where,
V: volume = 55.65mL = 0.05565 L
R: gas constant = 0.082 atm*L/mol*K
T: temperature = 60 + 273 = 333K
P: partial pressure of H2 = 0.888atm
Solve the equation for n and replace the values of the other parameters:
\(n=\frac{PV}{RT}=\frac{(0.888atm)(0.05565L)}{(0.082atm\cdot\frac{L}{\text{mol}\cdot K})(333K)}=0.00181mol\)Next, use the atomic weight to determine the mass of H2:
\(M=(\frac{2.0141g}{\text{mol}})(0.00181mol)=0.0036g\)Hence, there are 0.0036 g of H2 collected above the water
What 3 things can cause acceleration?
If there are 0.5 amps of current running through a circuit using a 9-volt battery, what is the resistance of the circuit?
Answer:
18
Explanation:
V = voltage
I = current
R = resistance
V = IR is the equation to find out the Voltage of an item so if we move around the equation so we are trying to resistance it would become R = V/I.
V = IR
R = V/I
R = 9/0.5
R = 18
An object with a mass of 5 kg is accelerated from rest by a 60 N*s impulse. What is the change in the object's velocity?
Hi there!
Using the Impulse-Momentum theorem:
I = Δp = mΔv
Where:
I = Impulse (Ns)
m = mass of object (kg)
Δv = change in velocity (vf - vi, m/s)
Plug in the given values and solve:
60 = 5Δv
Δv = 12 m/s
define about the laws of refraction .... 1st law and 2nd law in brief
Answer:
1 law the incident ray, the refracted ray and the normal at the point of incidence, all lie in the same plane
2 law when light ray passes from denser medium to rarer medium it bends away from the normal
Explanation:
What minimum height h must the track have for the marble to make it around the loop-the-loop without falling off?.
The minimum height of the loop without falling it off is 2.7(R-r).
What is height?
height is the measurement of someone or something .
Sol-It is given that capital art Israelis of loop. The loop. Small M. Is the mass of the marble. Small art is radius of the marble. We have to find minimum height edge. The track must have for the marble to make it around the loop. The loop without falling off coming to the solution. We have art is radius of solid marvel. Capital art is radius of circular, loop. Track moment of inertia of this is all in I is equal to two divided by five M. R squared. Thank you lad velocity of the marvel is equal. Do your makeup when the slides down the incline plane and regis the top of the loo. Let this be equation to and let this be equation three gain in potential energy related to center of mass is equal to mg. Multiplied by to capital R minus smaller. Let this be equation four. From law of conservation. Oh Nrg we have Equation one is equal to equation too plus equation three plus equation four substituting we have M G multiplied by H plus R is equal to half M V squared plus half I omega squared plus MG multiplied by two R -R. M G multiplied by H plus R. Is equal to half M B squared plus half. Multiplied by two divided by five M R squared. Omega square plus MG.
Hold square plus M G. Multiplied by two R minus R divide M G. On both sides we have H. Plus art Is equal to seven divided by 10, multiplied by R -R. Plus to r minus R. H plus odd as it will do 2.7 R -1.7 are therefore H is equal. Do 2.7 multiplied by R -R. Hence it can be concluded that height of the track. H is equal to 2.7 multiplied by R -R.
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what is the maximum speed of a 2.0 g particle that oscillates between x =2.0 mm and x =8.0 mm in
The period of motion is simple hormonic motion and the maximum speed of the particle is 0.0031s
(a) Simple harmonic motion is defined as "the motion of a mass on a spring when it is subject to the linear elastic restoring force given by Hooke's Law (F=-Kx). The motion experimented by the particle is sinusoidal in time and demonstrates a single resonant frequency".
(b) The equation that describes the simple harmonic motion is given by =
= X = Acos(ωt + θ) [1]
And taking the first and second derivate of the equation (1) we obtain the velocity and acceleration function respectively.
For the velocity:
= V = dx/dt = -Aωsin(ωt + θ) [2]
For the acceleration:
= A = dv/dt = -Aω²cos(ωt + θ) [3]
As we can see in equation [3] the acceleration would be maximum when the cosine term would be -1 and on this case:
= Aω² = 8x10³ m/s²
Since we know the amplitude A=0.002m we can solve for ω like this:
= ω = √ (8000/0.002)
= ω = 2000 rad
And we with this value we can find the period with the following formula;
= T = 2π/ω = 0.0031s
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The complete question:
A 10 g particle undergoes SHM with an amplitude of 2.0 mm and a maximum acceleration of magnitude 8.0 multiplied by 103 m/s2, and an unknown phase constant ?.(a) What is the period of the motion?1 s(b) What is the maximum speed of the particle?
What are your thoughts on alternative energy sources for
transportation (such as electric and hydrogen)?
Electric and hydrogen are promising alternative energy sources for transportation, offering benefits such as reduced emissions and lower operating costs, although they also face challenges related to infrastructure and production methods.
Electric and hydrogen are two promising alternative energy sources for transportation that have gained significant attention in recent years. Here are some key points about each:
Electric Vehicles (EVs): EVs use electricity stored in batteries to power an electric motor.
They offer several advantages, including zero tailpipe emissions, reduced dependence on fossil fuels, and lower operating costs compared to traditional internal combustion engine vehicles.
The growth of EV infrastructure and advancements in battery technology have contributed to their increasing popularity.
Hydrogen Fuel Cell Vehicles (FCVs): FCVs use hydrogen gas to generate electricity through a chemical reaction in a fuel cell, which then powers an electric motor. FCVs produce zero tailpipe emissions since the only byproduct is water vapor.
Hydrogen fuel can be refueled quickly, similar to traditional gasoline vehicles, providing a longer driving range compared to battery-powered EVs.
Both electric and hydrogen vehicles have their own set of challenges. For EVs, limited charging infrastructure and range anxiety remain concerns, although they have been improving over time.
Hydrogen FCVs face challenges related to hydrogen production, storage, and distribution infrastructure.
Additionally, the overall environmental impact of these alternative energy sources depends on the methods used for electricity or hydrogen production.
The adoption of alternative energy sources for transportation is a complex and evolving field.
It often involves a combination of technological advancements, policy support, and infrastructure development to enable widespread adoption and address existing challenges.
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Heat of ______ is the energy needed for a substance to change from a liquid to a gas
Answer:
Heat of vaporization
Explanation:
When water is at high levels of temperature heat is move as an energy source into the air.
Answer:
\(\boxed {\boxed {\sf Heat \ of \ vaporization}}\)
Explanation:
There are two options for this answer: heat of fusion or heat of vaporization.
Let's define both of the terms.
Heat of fusion:
The amount of heat needed to change a substance from a solid to a liquid.Heat of vaporization:
The amount of heat required to change a substance from a liquid to a gas.The question asks us which type of heat provides the energy for the phase change of a liquid to a gas. Therefore, the correct answer is heat of vaporization.
What is the difference between inertial mass and weight
Answer:
mass is the amount of matter in an object, whereas weight is the force exerted on an object by gravity
If the velocity is 33 cm/sec, and the flow is 4.4 L/min, what is the diameter of the aorta? 4. If the area of the aorta is 2.7 cm
2
, and the flow is 5.1 L/min, and the aorta branches in arteries totaling 50 cm
2
, what is the velocity in each branch artery? 5. What is the first branch off the aorta (not counting coronary arteries)? 6. The velocity of blood flow in the LVOT is 88 cm/sec, and the area of the LVOT is 7.7 cm, and the velocity in the aortic valve is 4.4 m/sec. What is the valve area? Flow behavior 1. What does "laminar" moses 2. What are the HW AS
The diameter of the aorta can be determined by using the given velocity and flow rate. The velocity in branch arteries can be calculated using the given flow rate and the total area of the arteries. The first branch off the aorta can be identified based on its location. The valve area can be determined by utilizing the given velocities and the area of the LVOT.
To calculate the diameter of the aorta, we need to relate the velocity and the flow rate. Velocity is given as 33 cm/sec, and the flow rate is 4.4 L/min. We can convert the flow rate to cm^3/sec (1 L = 1000 cm^3), which gives us a flow rate of 73.33 cm^3/sec. The flow rate is proportional to the cross-sectional area of the vessel multiplied by its velocity. Using the formula Q = A * V, where Q is the flow rate, A is the cross-sectional area, and V is the velocity, we can rearrange the formula to solve for the diameter of the aorta.
To determine the velocity in each branch artery, we can use the given flow rate of 5.1 L/min and the total area of the branch arteries, which is 50 cm^2. By dividing the flow rate by the total area, we can find the velocity in the branch arteries.
Identifying the first branch off the aorta requires knowledge of the anatomy. Typically, the first branch off the aorta is the brachiocephalic trunk, which divides into the right subclavian artery and the right common carotid artery.
To calculate the valve area, we can utilize the velocities and the area of the left ventricular outflow tract (LVOT). The velocity in the aortic valve is given as 4.4 m/sec, and the velocity in the LVOT is 88 cm/sec. The valve area can be determined using the continuity equation, which states that the product of the cross-sectional area and velocity at one point is equal to the product of the cross-sectional area and velocity at another point along the flow path.
In summary, the diameter of the aorta can be determined using the given velocity and flow rate. The velocity in branch arteries can be calculated using the flow rate and the total area of the arteries. The first branch off the aorta is typically the brachiocephalic trunk. The valve area can be calculated using the velocities and the area of the LVOT, utilizing the continuity equation.
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A 25.0 kg door is 0.925 m wide. A customer
pushes it perpendicular to its face with a 19.2
N force, and creates an angular acceleration
of 1.84 rad/s2. At what distance from the axis
was the force applied?
[?] m
Hint: Remember, the moment of inertia for a panel
rotating about its end is I = mr².
The distance from the axis of the force applied is 2.05 m.
What is the distance from the axis of the force applied?The distance from the axis of the force applied is calculated as follows;
The formula for torque;
τ = Fr
where;
F is the applied forcer is the distance from the axis of the force appliedAnother formula for torque is given as;
τ = Iα
where;
I is the moment of inertia of the doorα is the angular acceleration;τ = (mr²)α
τ = (25 kg x (0.925 m)²) x (1.84 rad/s²)
τ = 39.36 Nm
The distance is calculated as;
r = τ/F
r = ( 39.36 Nm ) / (19.2 N)
r = 2.05 m
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SORRY LAST ONE FOR TODAY, IM GOING TO PASS IF I GET THIS ANSWERED
A cannon fires a cannonball directly upwards at +150m/s. How long does it take for the cannonball to reach maximum height?
Answer:
According to the Given Statement
Canon fires directly upwarda at 150m/s ( Initial speed, u )
Acceleration due to gravity is 10m/s²
Since Cannon ball reach it maximum height so its final velocity v will be 0 m/s .
Using Kinematic Equation
v = u + gtOn substituting the value we get
➥ 0 = 150 + 10 × t
➥ 150 = 10 × t
➥ 150/10 = t
➥ 15 s = t
So, it will take 15 seconds .
Answer:
maximum height reached: 15 s
Explanation:
using the formula: maximum height reached = [(sin(θ) * speed)/ gravity]
Here speed is 150m/s and gravity is 10 m/s² and as it does directly upwards, it has an angle of 90°
using the formula:
maximum height reached = [(sin(90) * 150)/ 10] = 15 s
What is defined by force per unit area?
O temperature
O gravity
O force
O pressure
while driving at night, a vehicle coming toward you has its high beams on, making it hard for you to see the road ahead. you should:
High beams cause blindness while driving. Look right, and follow the white line till the vehicle passes to see the road.
What to do when oncoming high beams make it hard to see the road at night?When a vehicle coming toward you has its high beams on, the bright light can cause temporary blindness and make it hard to see the road ahead. This is because the bright light scatters within the eye, causing the pupil to contract and reducing the amount of light entering the eye. To avoid this, it is recommended to look towards the right edge of the road and use the white line as a guide until the vehicle passes. This will prevent temporary blindness and allow you to see the road ahead more clearly.
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What are the three kinds of load that make up the particles a stream carries? Name and define each type.
The three kinds of load that make up the particles a stream carries are bed load, suspended load, and dissolved load.
Larger particles like gravel, rocks, and boulders that are too heavy to be raised into the water column make up the bed load in streams and rivers. By rolling, sliding, or bouncing along the stream bed, these particles are propelled along by the flow of the stream. The stream's capacity for erosion and its capacity to carry material downstream can both be impacted by the quantity and size of the bed load.
On the other hand, suspended load is made up of smaller, lighter particles that can be lifted and moved within the water column, including silt and clay. The turbulent stream flow keeps these particles suspended, and the amount of each particle varies depending on the stream's velocity and the amount of silt present.
The term "dissolved load" describes the minerals, salts, and organic molecules that are dissolved in the water. These materials are dissolved inside the water rather than being visible as particles. The term "dissolved load" refers to the amount of material that dissolves into the water of a stream as a result of chemical weathering processes. It may have an impact on the stream's chemical make-up and be crucial for water quality and biogeochemical cycling.
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What are the 7 steps of scientific method in order?
Answer:
1. Make an observation or ask a question.
2. Gather background information.
3. Create a hypothesis.
4. Create a prediction and perform a test.
5. Analyze the results and draw a conclusion.
6. Share the conclusion or decide what question to ask next.
7. Document the results of your experiment.
Hope this helps!
Seven scientific methods are observation, research, hypothesis, experimentation, data collection, result, conclusion and note.
What are the steps of scientific method ?Observation: Observe and identify a problem or question to be solved.
Research: Research and gather information and background knowledge on the problem.
Hypothesis: Develop a possible solution or explanation (hypothesis) for the problem.
Experimentation: Plan and conduct experiments to test the hypothesis.
Data Collection: Collect and analyze data from the experiments.
Results: Interpret and analyze the results to determine if the hypothesis was supported or rejected.
Conclusion: Draw a conclusion and make a statement about the problem based on the evidence collected during the experiments.
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I need help yall im lowkey confused abt this and its a project grade due today
Predict the energy transformations when a fast moving roller coaster finishes its ride and comes to a stop. Give three possibilities
The three possibilities are discussed below.
What is Mechanical Energy?Energy of a body due to its motion or its position is called its mechanical energy. It is the sum of kinetic energy (E[K]) due to its motion and potential energy (E[P]) due to its position. Mathematically -
E[M] = E[K] + E[P]
E[M] = 1/2 mv² + mgh = m (v²/2 + gh)
Given is a fast moving roller coaster.
In a roller coaster ride, the tracks on which the coaster moves are not straight. The go up and down. We will assume that our roller coaster is moving over such a track. Let's discuss the 3 possibilities →
Possibility 1 → Coaster moving up on tracks from bottom and reaches top.
In this case, as the coaster moves up the track its velocity starts to decrease and its height starts to increase. The kinetic energy of the coaster will be E[K] = 1/2 mv². As it starts to move upwards its velocity and therefore its kinetic energy starts converting into Potential energy and at the top the coaster velocity becomes 0, indicating that the kinetic energy of the coaster is now completely converted into Potential energy given by E[P] = mgh
Possibility 2 → Coaster moves down from the top
In this possibility, the opposite of possibility 1 happens. The potential energy starts to convert into the kinetic energy as the roller accelerates under the influence of acceleration due to gravity and as it reaches the bottom, the potential energy is completely converted into kinetic energy.
Possibility 3 → When the coaster is in the midway of its path in moving from bottom to top or top to bottom.
In this case, in the midway of the energy transformation, the total mechanical energy of the coaster is half potential and half kinetic.
Therefore, the three possibilities have been discussed.
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a force of 300n produces pressure of 20 N/m2. On what are is it acting? show your working
Answer:
Explanation:
Given:
F = 300 N
p = 20 N/m²
__________
A - ?
Valid for the area A:
A = F / p
A = 300 / 20 = 15 m²
in the use of coal to produce energy, which does not decrease the energy efficiency of the process? * 1 point extracting the coal from the ground waste heat cogeneration energy required to build the power plant
the power efficiency of the procedure when using coal to produce energy extracting the coal again from earth gasification energy required to construct the power plant.
What kind of coal burns with the greatest amount of thermal energy released?Lignite has the minimum energy output of all coal grades and contains 25%–35% carbon. Lignite coal deposits are frequently rather recent and have not been subjected to high temperatures or pressures. Due to its high moisture content and brittle nature, lignite has a low heating value.
Which of the aforementioned Macq sources has the highest energy production?The Urban Local Organizations of the individual cities are to carry out the program. The MNRE/GOI approved the construction of Faridabad and Dwarka as Solar Cities with its sanction dated 25.6.09, at an estimated Photovoltaic solar energy in particular is gaining popularity.
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Trey is skiing on a circular ski trail that has a radius 0.8 km long. Trey starts at the 3-o'clock position (the easternmost point on the trail) and travels 2.75 km in a counterclockwise direction. Imagine an angle with its vertex at the center of the circular trail that subtends the path Trey skis. a. What is the angle's measure in radians?
The length of the subtended arc divided by the circle's radius, r, is the radian measurement of the angle.
For instance, if the circle's radius is two and the arc's length is three, the radian measurement is 1.5.
To find the angle's measure in radians, we need to use the formula:
angle (in radians) = distance traveled / radius
In this case, Trey traveled 2.75 km along the circular ski trail with a radius of 0.8 km. So the angle's measure in radians is:
angle (in radians) = 2.75 km / 0.8 km = 3.4375 radians
Therefore, the angle's measure in radians is approximately 3.4375 radians.
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