Kinetic energy and potential energy#2
1. if each story is 2.50 m high, what is the gravitational potential energy of a 61.2 kg person standing on the
roof of a 10-story building relative to:
a. the tenth floor (15300 j)
b. the sixth floor (9180 j)
c. the first floor (1530 )

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

What part of the ear is names after tools, such as the hammer and the anvil?

During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.