1. A child is drinking a liquid with a straw. Which of thefollowing statements is true? Why?
a. Longer Straws work better because the pressure is largerdeeper down.
b. The pressure inside the straw depends on the viscosity of theliquid.
c. The pressure in the straw is reduced and the liquid is pushedupward by atmospheric pressure on the surface of the liquid.
2. If you hold a light tissue in your hands and gently blowacross its top, the tissue will rise slightly because of what?Why?
a. Blowing across the tissue removes all of the air, and thenthe air below the tissue pushes the tissue up.
b. Collisions of the moving air with the tissue cause it torise.
c. The pressure of moving air is less than that of staticair.
3. Even though your car weighs several thousand pounds, it caneasily be raised above your head by a pneumatic lift at the servicestation by a small motor pumping fluid through a pipe. This is anillustration of? Why?
a. Pascal's Principle
b. Archimedes' Principle
c. Newton's 3rd Law
4. Two identical objects, one light colored and the other darkcolored, are the same elevated temperature, 50?. You now place themin a dark, much cooler room. Which object will reach the room'stemperature first? Why?
a. The dark colored object
b. Both reach room temperature at the same time
c. As strange as it seems, neither object will ever reach roomtemperature because energy conservation prevents loss of energy
5. The circulatory system, lake inversion, shore breezes, andheating systems are all examples of what type of heat transfer?Why?
a. Convection
b. Radiation
PLEASE ANSWER WHY ON ALL QUESTIONS!
