Find the potential energy associated with a 69-kg hiker atop new hampshire's mount washington, 1900 m above sea level. take the zero of potential energy at sea level.

Imagine riding a single-speed bicycle. why do you have to push harders on the pedals to start the bicycle moving than to keep it moving at constant velocity?

Giraffe bending to drink. In a giraffe with its head 1.83 m above its heart, and its heart 2.04 m above its feet, the (hydrostatic) gauge pressure in the blood at its heart is 246 torr.

You push a block to the top of an inclined plane. The mechanical advantage of the plane is 5. The inclined plane is 10 meters long. What is the height of the inclined plane? 10 m 50 m 2 m 0.5 m

9. Early expeditions to Antarctica reported on seeing fossils, but they did not collect them. Who first reported seeing fossils of leaves and stems of plants? Who reported finding beds of coal near the South Pole?

Where can electromagnetic waves travel that mechanical waves do not

Objects can be accelerating and traveling at constant velocity at the same time. True or False

What kind of star gives rise to a type i supernova? a. white dwarf stars b. massive main sequence stars c. red giant stars?

Example of an object in motion

A proton and an alpha particle are momentarily at rest at a distance r from each other. They then begin to move apart. Find the speed of the proton by the time the distance between the proton and the alpha particle doubles.

Why is it a good idea to extend your bare hand forward when you are getting ready to catch a fast-moving baseball? a. So you can catch the ball with a stiff arm, increasing the time to slow the ball thus deceasing the force. b.