Water waves change direction when they encounter water of different depths and begin to move at different wave speeds. this is called
a. reflection
b. constructive interference
c. the doppler effect
d. refraction

In a system, when potential energy decreases, then entropy also decreases. true false

Which sound characteristic is not affected by the relative motion of an object

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above