# midterm physics 2

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1.
1 point
refers to gases and liquids
2.
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In an airplane wing, air at the bottom must travel farther, so it moves faster, and the pressure there is lower, creating lift.
3.
1 point
The freezing point of a solution, such as salt water, is lower than the freezing point for the solvent by itself.
4.
1 point
Which of the following is NOT a unit of heat?
5.
1 point
Oil, for example, flows more easily than molasses. This is because molasses has a higher viscosity, which is a measure of resistance to fluid flow.
6.
1 point
You squeeze a tube of toothpaste. The pressure of the toothpaste does not just go up at the place where you are squeezing it. It goes up by the same amount everywhere in the tube. This is an application of
7.
1 point
Example of Thermal Expansion
8.
1 point
A wood-burning fireplace has a chimney which allows the heated air to rise and escape the house. How then does a fireplace then heat the room?
9.
1 point
simply mass per unit volume
10.
1 point
The second law of thermodynamics has a lot to do with
11.
1 point
Which of the following is true about the x component of a projectile?
12.
1 point
Which of the following is a unit of pressure
13.
1 point
The lower the pressure on a liquid, the easier it is to make it boil
14.
1 point
lower up the mountains than at sea level
15.
1 point
Pressure Depends on
16.
1 point
At what temperature reading are the Fahrenheit and Celsius scale the same?
17.
1 point
Which process shows an increase in entropy?
18.
1 point
When a material is hot, it has more thermal energy than when it is cold.
19.
1 point
Ice is more dense that water since it is a solid
20.
1 point
Steel can float if shaped like a boat, because in that shape it can displace as much water as its own weight.
21.
1 point
2 atmospheres is equal to
22.
1 point
A physical quantity that is proportional to the average kinetic energy of translation of particles in matter.
23.
1 point
People need seatbelts to prevent injuries from the tendency of the body to surge forward because of collisions. This tendency follows the __ of motion
24.
1 point
Hot fluids rise and cool fluids sink in
25.
1 point
Why do swimmers float better in the ocean than in a lake?
26.
1 point
force per unit area
27.
1 point
The absolute temperature scale is
28.
1 point
Two guys have different masses. The guy with a bigger mass has greater weight than the guy with smaller mass in the presence of a gravitational field. This is an application of the __ law
29.
1 point
Strong, naturally occurring winds can damage structures through
30.
1 point
A submarine is submerged in water, while a blimp is submerged in air. In each a pascal force must balance the weight of the vessel.
31.
1 point
It takes longer to cook food in boiling water at high altitudes
32.
1 point
Adhesion is the clinging together of molecules/atoms of two different substances
33.
1 point
The only force acting on a projectile is
34.
1 point
An incompressible fluid, like water, flowing through a pipe will speed up if the pipe gets wider
35.
1 point
how can some insects walk on water?
36.
1 point
The specific heat of water and aluminum is 4.186 and 0.900 kj/kg C. An 800 g aluminum teakettle contains 2.00 kg of water at 15.0 C. How much heat is required to raise the temperature of the water (and kettle) to the boiling point of pure water?
37.
1 point
states that any object that is partially or completely submerged in a fluid is buoyed up a force equal to the weight of the fluid that the object displaces
38.
1 point
Newton's second law of motion has to something to do with
39.
1 point
the faster a fluid is moving the less pressure it exerts.
40.
1 point
Enthalpy is a measure of randomness or disorder in a system.