SAT Physics: Radiations Multiple Choice Questions (MCQ) PDF - 64

MCQ 316: Thermal energy from infrared waves is called

1. converted heat
2. radiant heat
3. convection heat
4. potential heat

MCQ 317: The distance between air molecules is

1. 1 ×10^-8 m
2. 1 ×10^-4 m
3. 1 ×10^-3 m
4. 1 ×10^-6 m

MCQ 318: On Moon the gravitational field strength is about

1. 3.5 N kg^-1
2. 10 N kg^-1
3. 1.6 N kg^-1
4. 5 N kg^-1

MCQ 319: All objects falling under gravity acceleration at the same

1. constant rate
2. negative rate
3. increasing rate
4. decreasing rate

MCQ 320: The specific latent heat of vaporization is 2.25 × 10⁶ J kg^-1.If a man generates 800 J of heat every second by running, and half heat is lost from the body by evaporation, what is the mass of water evaporated in a 2 hour running?

1. 2 kg
2. 1.28 kg
3. 3.2 kg
4. 1.67 kg