MCQ24

The lowest temperature possible in nature is

•   4 K.

•   -273 degrees C.

•   0 degrees C.

•   none of the above

Which of these units of temperature is larger?

•   a Kelvin

•   a Celsius degree

•   both are the same size

•   none of the above

Water freezes at atmospheric pressure and a temperature of

•   0 degrees Celsius.

•   about 273 kelvin.

•   32 degrees Fahrenheit.

•   all of the above

•   none of the above

Internal energy in thermodynamics is the same as

•   thermal energy.

•   temperature.

•   heat.

•   all of the above

When Philadelphia's temperature is 40°F and Miami's temperature is 80°F,

•   Miami is warmer than Philadelphia.

•   Miami is twice as hot as Philadelphia.

•   both of these

•   neither of these

An equal amount of 0°C air that is twice as hot has a temperature of

•   0°C.

•   64°C.

•   273°C.

•   100°C.

•   none of the above

If a 5°C piece of iron is heated until it has twice as much internal energy, its temperature will be

•   10°C.

•   556°C.

•   273°C.

•   283°C.

•   278°C.

If a 10°C piece of iron is heated until it has twice as much internal energy, its temperature will be

•   566°C.

•   20°C.

•   293°C.

•   273°C.

•   none of the above

The first law of thermodynamics is a restatement of the conservation of

• momentum

•   electric charge.

• energy

•   all of the above

•   none of the above

The change in internal energy of adding 100 joules to a system that does 60 joules of work is

•   40 J.

•   0 J.

•   100 J.

•   60 J.

•   none of the above