Three thermometers are in the same water bath. After thermal equilibrium is established, it is found that the Celsius thermometer reads 0 °C, the Fahrenheit thermometer reads 12 °F, and the Kelvin thermometer reads 273 K. Which one of the following statements is the most reasonable conclusion?

Water is flowing in a horizontal pipe of diameter d. If you want to change the diameter of this pipe so that the speed of the water would be half as great as it was, what should be the new diameter?

 

d square root of 2

When you stand with only one of your feet on a weighing scale, the scale reading is

 

same as both feet

The volume flow rate does not depend of:

mass of the fluid

If the gauge pressure at a certain depth in Lake Michigan is 3.5 atmospheres, the absolute pressure at that depth is 4.5 atm.

true

If the absolute pressure at a certain depth in the ocean is 2 atm, the absolute pressure will be 4 atm if you go twice as deep.

false

If two objects have the same moment of inertia, they must have the same mass.

false

A ball that gains speed as it rolls down a hill experiences a

net force and net torque

A ball gains speed while rolling down a hill due mainly to

unbalanced torque

An object will be stable if

 

its center of gravity lies over its base of support.

When a ball on the end of a string is swung in a vertical circle, the ball is accelerating because

 

the direction is changing

When using the term “uniform circular motion,” what do we mean by the term “uniform?”

 

The motion of the object is at a constant speed.

For uniform circular motion, the acceleration

 

is directed toward the center of the circle

A liquid is in equilibrium with its vapor in a closed vessel. Which one of the following statements is necessarily true?

 

The temperature of the vapor is the same as that of the liquid.

Heat is added to a sample of water in an insulated container. Which one of the following statements is necessarily true?`

 

The type of change that will occur depends on the original temperature of the water.

Which would cause a more serious burn: 30 g of steam or 30 g of liquid water, both at 100 °C; and why is this so?

 

Steam, because of its latent heat of vaporization

Heat is added to a substance, but its temperature does not rise. Which one of the following statements provides the best explanation for this observation?

 

The substance undergoes a change of phase.

Which one of the following statements is the best explanation for the fact that metal pipes that carry water often burst during cold winter months?

 

Water expands upon freezing while the metal contracts at lower temperatures.

Which one of the following would probably not be used as a temperature sensitive property in the construction of a thermometer?

 

the change in mass of a solid

Which one of the following statements correctly describes the Celsius and the Kelvin temperature scales?

 

The size of the degree on each scale is the same

Two cubes, one silver and one iron, have the same mass and temperature. A quantity Q of heat is removed from each cube.  Which one of the following properties causes the final temperatures of the cubes to be different?

 

specific heat capacity