A glass of water has a temperature of 31 degrees Celsius. What state of matter is it in?

1. solid
2. liquid
3. gas
4. plasma

1. The thermal energy of the system is the average kinetic energy of the system’s constituent particles due to their motion. The total internal energy of the system is the sum of the kinetic energies and the potential energies of its constituent particles.
2. The thermal energy of the system is the average potential energy of the system’s constituent particles due to their motion. The total internal energy of the system is the sum of the kinetic energies and the potential energies of its constituent particles.
3. The thermal energy of the system is the average kinetic energy of the system’s constituent particles due to their motion. The total internal energy of the system is the sum of the kinetic energies of its constituent particles.
4. The thermal energy of the system is the average potential energy of the systems’ constituent particles due to their motion. The total internal energy of the system is the sum of the kinetic energies of its constituent particles.

What does the Celsius scale use as a reference point?

1. The boiling point of mercury
2. The boiling point of wax
3. The freezing point of water
4. The freezing point of wax

1. ${\text{J/kg}}^2\cdot {}^{\circ }\text{C}$
2. $\text{J}\cdot {\text{kg}}^2{/}^{\circ }\text{C}$
3. $\text{J}\cdot \text{kg}/{}^{\circ }\text{C}$
4. $\text{J/kg}{\cdot }^{\circ }\text{C}$

1. The transfer of energy through emission and absorption of the electromagnetic waves is known as radiation.
2. The transfer of energy without any direct physical contact between any two substances.
3. The transfer of energy through direct physical contact between any two substances.
4. The transfer of energy by means of the motion of fluids at different temperatures and with different densities.

1. Temperature difference is dependent on the chosen temperature scale.
2. Temperature change is different in units of kelvins and degrees Celsius.
3. Reading of temperatures in kelvins and degree Celsius are the same.
4. The temperature change is the same in units of kelvins and degrees Celsius.

1. No, the energy of the radiation increases as the temperature increases, and the radiation becomes visible at certain temperatures.
2. Yes, the energy of the radiation decreases as the temperature increases, and the radiation remains invisible at those energies.
3. No, the energy of the radiation decreases as the temperature increases, until the frequencies of the radiation are the same as those of visible light.
4. Yes, as the temperature increases, and the energy is transferred from the object by other mechanisms besides radiation, so that the energy of the radiation does not increase.

What is the specific heat of a substance that requires 5.00 kJ of heat to raise the temperature of 3.00 kg by 5.00 °F?

1. 3.33×103 J/kg ⋅° C
2. 6.00×103 J/kg ⋅° C
3. 3.33×102 J/kg ⋅ ° C
4. 6.00×102 J/kg ⋅ ° C

A certain quantity of water is given 4.0 kJ of heat. This raises its temperature by 30.0 °F. What is the mass of the water in grams?

1. 5.7 g
2. 570 g
3. 5700 g
4. 57 g

5290 J of heat is given to 0.500 kg water at 15.00 °C. What will its final temperature be?

1. 15.25° C
2. 12.47 ° C
3. 40.3° C
4. 17.53° C

1. The energy is used to break bonds between particles, and so does not increase the potential energy of the system’s particles.
2. The energy is used to break bonds between particles, and so increases the potential energy of the system’s particles.
3. The energy is used to break bonds between particles, and so does not increase the kinetic energy of the system’s particles.
4. The energy is used to break bonds between particles, and so increases the kinetic energy of the system’s particles.

In which two phases of matter do atoms and molecules have the most distance between them?

1. gas and solid
2. gas and liquid
3. gas and plasma
4. liquid and plasma