Which can give off more heat: a glass full of hot water, or a pitcher full of hot water that has the same temperature? A. The glass of water can give off more heat.
B. Both can give off the same amount of heat.
C. The pitcher of water can give off more heat.
D. Neither one can give off heat.

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

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?