Figure 16.14 shows a simple barometer. a). What is the region A?
b). What keeps the mercury in the tube?
c). What is the value of the atmospheric pressure being
shown by the barometer?
d). What would happen to this reading if the barometer
were taken up a high mountain? Give a reason.

An object's buoyant force and weight mean the same thing.a. trueb. false

What belongs in the areas marked x and y? x: the internal energy of a piston system increases as heat is added and rises to a cool area y: as thermal energy is added to a container, some of the energy is lost to the environment x: as thermal energy is added to a container, some of the energy is lost to the environment y: the internal energy of a piston system increases as heat is added and rises to a cool area x: a cold spoon placed in hot liquid gets warmer y: thermal energy is converted to light energy x: thermal energy is converted to light energy y: a cold spoon placed in hot liquid gets warmer

Electromagnetic force is present when electromagnetic fields a.become charged as they lose electrons. b.become stable as they come in contact with other forces. c. interact with charged particles. d.gain energy from other forces.