NSAA NSAA Physics - Thermal Physics and Thermodynamics

Question 1

What is the SI unit of temperature used in thermodynamic equations?

Accepted Answer

Kelvin (K)

Answer

Celsius (°C)

Answer

Fahrenheit (°F)

Answer

Rankine (°R)

Question 2

The zeroth law of thermodynamics states that if object A is in thermal equilibrium with object B, and B is in thermal equilibrium with object C, then:

Accepted Answer

A and C are in thermal equilibrium with each other

Answer

A has more thermal energy than C

Answer

B must be hotter than both A and C

Answer

A and C may or may not be at the same temperature

Question 3

For an ideal gas, the internal energy depends only on:

Accepted Answer

Temperature alone

Answer

Pressure alone

Answer

Volume alone

Answer

Both pressure and volume

Question 4

Which law of thermodynamics is the law of conservation of energy?

Accepted Answer

First Law

Answer

Zeroth Law

Answer

Second Law

Answer

Third Law

Question 5

The specific heat capacity of water is 4,200 J kg⁻¹ K⁻¹. How much energy is required to raise 2 kg of water by 5°C?

Accepted Answer

42,000 J

Answer

840 J

Answer

4,200 J

Answer

21,000 J

Question 6

During an isothermal process involving an ideal gas, which quantity remains constant?

Accepted Answer

Temperature

Answer

Pressure

Answer

Volume

Answer

Entropy

Question 7

The relationship between the Kelvin and Celsius scales is:

Accepted Answer

K = °C + 273

Answer

K = °C + 100

Answer

K = °C − 273

Answer

K = °C × 1.8