1.do materials change when light is reflected off to them a. yes
b. no
c. maybe

2. do materials change when light is transmitted through them

a. yes
b. no
c. maybe

3.if the material was not changed was energy absorbed

a. yes
b. no
c. maybe

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is