If astronauts travel from Earth to the moon ( smaller than the Earth ) , what can be said about their mass and weight? A. Their mass and weight would both change
B. Their mass would increase but their wight would decrease.
C. their mass would stay the same but their wight would decrease.
D. Their mass and weight would both increase.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)

Which of the following are guidelines to follow for obtaining accurate observations