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3 years ago

"a 1,600 kg car is traveling at a speed of 12.5 m/s. what is the kinetic energy of the car?"

Physics

1 answer:

xxTIMURxx [149]3 years ago

6 0

I had this question before can you show me the answers choices

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Which is an example of nuclear energy being converted into heat and light?

Ann [662]

Answer:

<h3>D. A coal burning power plant</h3><h3 />

Explanation:

it is a coal power plant , nuclear power is economical and does not fluctuate as much as wind or solar power.

Unlike coal, it is considered clean in terms of the amount of greenhouse gas emissions produced by the power plant itself, although uranium mining and processing are not without risks and environmental impact

8 0

3 years ago

Suppose oil spills from a ruptured tanker and spreads in a circular pattern. If the radius of the oil spill increases at a const

Dafna1 [17]

Answer:

$\frac{dA}{dt} = 188.5 m^2/s$

Explanation:

As we know that area of the circle at any instant of time is given as

$A = \pi r^2$

now in order to find the rate of change in area we will have

$\frac{dA}{dt} = 2\pi r\frac{dr}{dt}$

here we know that

rate of change of radius is given as

$\frac{dr}{dt}= 1 m/s$

radius of the circle is given as

$r = 30 m$

now we have

$\frac{dA}{dt} = 2\pi (30)(1)$

$\frac{dA}{dt} = 60\pi$

$\frac{dA}{dt} = 188.5 m^2/s$

8 0

4 years ago

A flywheel flows from 250rpm to 150rpm in 4.2 seconds. How many revolutions occur during this time

Assoli18 [71]

Answer:

7revolutions

Explanation:

Given parameters:

Initial revolution = 250rpm

Final revolution = 150rpm

Time = 4.2s

Unknown:

Number of revolutions that occur at this time = ?

Solution:

To solve this problem;

let us find the change in revolution = 250rpm - 150rpm = 100rpm

Convert the time to seconds;

60s makes 1 minute

4.2s will make $\frac{4.2}{60}$ = 0.07min

So;

The number of revolutions at this time = 100rpm x 0.07min

= 7revolutions

6 0

3 years ago

A police car parked on the side of the highway emits a 1200 Hz sound that bounces off a vehicle farther down the highway and ret

emmasim [6.3K]

f' = frequency observed by the police car after sound reflected from the vehicle and comes back to police car = 1250 Hz

f = frequency emitted by the police car = 1200 Hz

V = speed of sound = 340 m/s

v = speed of vehicle = ?

frequency observed by the police car is given as

f' = f (V + v)/(V - v)

inserting the values in the above equation

1250 = 1200 (340 + v)/(340 - v)

v = 6.9 m/s

4 0

4 years ago

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The hydrogen and helium under the clouds of Jupiter are in liquid form due to _____.

asambeis [7]

<span>high pressure produced by the clouds because its the most likely!!!!!!!!!!</span>

8 0

4 years ago

Read 2 more answers