Which of the following is an example of work being done on an object?
A-Water in a pot changes into steam.
B-A man pushes a couch across the room.
C-A prism scatters ultraviolet light into visible light.
D-A box rests on the floor.

Aquantity of gas has a volume of 1.5 m3 and an absolute pressure of 95 kpa. when the gas is compressed to a volume of 0.5 m3, what is the new absolute pressure of the gas? (assume that there’s no change in temperature.)

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.