A 79.9 kg wood board is resting on very smooth ice in the middle of a frozen lake. A 43.5 kg boy stands at one end of the board. He walks from one end of the board to the other end with a velocity of 1.51 m/s relative to the ice in the positive direction. What is the velocity of the board relative to the ice?

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

Ain is , is 's of ? 0.62 0.79 1.27 1.50

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.