If the height a barrel is raised above the ground triples, then its PE will be a.) 1/9
b.) 1/3
c.) the same
d.) 3x
e.) 6x
ab.) 9 x

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .