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4 years ago

The molecules in which of the following have the greatest average molecular kinetic energy?

1 answer:

8 0

We would need examples but kinetic energy is the energy you get when something moves. The answer will be the one where the molecules are more spread out because they move more.

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If you push against a stationary brick wall for several minutes, you do no work

bazaltina [42]

B because in science work means moving an object over a distance

5 0

3 years ago

f the CD rotates clockwise at 500 rpmrpm (revolutions per minute) while the last song is playing, and then spins down to zero an

vazorg [7]

Answer:

The magnitude of the angular acceleration is $a = 20.14 rad/s^2$

Explanation:

From the question we are told that

The angular speed of CD is $w_{CD} = 500 rpm = \frac{500 rpm}{\frac{60 \ s }{1 \ min} } * \frac{2 \pi }{ 1 \ rev} = 52.37 rad/s$

time taken to decelerate is $t_{CD} = 2.60\ s$

The final angular speed is $w_f= 0 \ rad/s$

The angular acceleration is mathematically represented as

$a = \frac{w_f - w_{CD}}{t}$

substituting values

$a = \frac{0 - 52.37}{2.60}$

$a = - 20.14 rad/s^2$

The negative sign show that the CD is decelerating but the magnitude is

$a = 20.14 rad/s^2$

3 0

3 years ago

A ball dropped from a height of 50 meters, Determine the speed of the ball after 3 seconds

Alex17521 [72]

16.7 m/s

To determine the speed we use the formula: Distance ÷ Time so, 50 ÷ 3 = 16.66... ( rounded off to 1.d.p is 16.7).

8 0

4 years ago

A correlation coefficient represents what two things

kenny6666 [7]

Answer:

A correlation coefficient represents the following:

1- The direction of the relationship

2- The strength of the relationship

3 0

3 years ago

A ball is kicked horizontally at 10.0 m/s from a cliff 100m high. How far from the base of the cliff will the stone strike the g

Black_prince [1.1K]

bggdgggxccc

Explanation:

jrhvbjgvbjvgbh

3 0

3 years ago