In Case 1, is the magnitude of the force exerted on block A by the platform greater than, less than, or equal to the magnitude of the force exerted on the platform by block A.
a. mag. of force on A by platform > mag. of force on platform by A
b. mag. of force on A by platform < mag. of force on platform by A
c. mag. of force on A by platform = mag. of force on platform by A

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?