Which of the following is an example of sound energy?

A. a tv signal lost bc of a storm

B. the waves from a star seen in the sky

C. a light bulb giving off energy as heat

D. waves moving through air after a crash

A skydiver is falling at constant velocity. If a force of 600 N is pulling down on the skydiver, how much force must be acting upward on the skydiver? exactly 600 N slightly more than 600 N slightly less than 600 N exactly 0 N

What causes a car to accelerate slowly in uphill?

The second law of motion states that force is equal to mass times acceleration. How much more force would be required to accelerate a fifty-ton ship at the same rate as a ten-ton ship? The same Two times Five times Ten times

Sallys physical education teacher timed her run and recorded the time and distance in the table below. What is her average speed? Time (s) : 1, 2, 3, 4, 5 Distance (m) : 2, 5, 7, 10, 12 A) 3 m/s B) 2.5 m/s C) 2 m/s D) 4 m/s

Which units are used to measure both velocity and speed? Select three options. m/s dt km/h mph Iph

The period of a simple pendulum is 3.8 s. the length of the pendulum is doubled. what is the period t of the longer pendulum? t = s

True or false - sound waves can travel across outer space.

In which one of the following locations can a person hear the echo of a sound? a. At least 33.2 meters behind the reflecting surface b. Less than 16.6 meters in front of the reflecting surface c. Less than 33.2 meters behind the reflecting surface d.

F an electron fell to a lower orbit or energy level, energy would be A. created. B. emitted. C. absorbed. D. transferred.

Which is the correct order from the closest to the sun to the farthest away from the sun? A. terrestrial planets, asteroid belt, gas planets, Kuiper belt B. gas planets, asteroid belt, terrestrial planets, Kuiper belt C.