Which example possesses mechanical potential energy?. A. a taut guitar string. B. an oscillating pendulum. C. a roller coaster ride. D. a child on a swing. E. a speeding car

15 J of work were expended moving an 18 kg block. At what velocity did the block move?

A scientist spends most of his time observing the night time sky and tracking the orbits of planets. Which branch of physical science is he most likely studying?

A feather is dropped on the moon from a height of 2.0 meters. The acceleration of gravity on the moon is 1.67 m/s2. Determine the time for the feather to fall to the surface of the moon.

The movement of the plates of the Earth are responsible for exposing rocks to weathering. True or False

Compare to visible light, the wavelength of x-rays is ___ and the frequency is ___.

Two spaceships of mass 300,000 kg are 250 m apart. what is the force of gravity between them? (G = 6.67 times 10⁻¹¹ N*M²/kg²)

Air pressure is 1.0 · 105 N/m2, air density is 1.3 kg/m3, and the density of soft drinks is 1.0 · 103 kg/m3. If one blows carefully across the top of a straw sticking up 0.

What kind of motion happens at the atomic/molecular level of ALL solids, liquids and gases?

During a firework show, a family sees the spray of sparkles from an exploding firework high in the sky and, a moment later, hears the pop. Which of these best explains why the pop and spray do not seem to occur at the same time? a.

How long does it take the ball to reach its maximum height? answer in units of s?