Temperature Scales Quiz PDF: Questions and Answers - 67

MCQ 331: Boiling point of liquid hydrogen is equal to 20 K, which is equal to

1. −293 °C
2. −253 °C
3. 293 °C
4. 253 °C

MCQ 332: If two forces of 3 N acting on an object in opposite direction. The resultant force will be

1. 6 N
2. 3 N
3. 9 N
4. Zero

MCQ 333: A car stops and then starts accelerating uniformly at rate of 3 m s^-2, speed of car after 20 seconds is

1. 40 m s^-2
2. 60 m s^-2
3. 100 m s^-2
4. 30 m s^-2

MCQ 334: An object has E_p of 500 J with a mass of 25 kg and gravity of 10 N kg^-1, height of object is

1. 20 m
2. 1250 m
3. 2 m
4. 125000 m

MCQ 335: Solid melts because the

1. intermolecular bonds get weak
2. thermal energy increases the rate of kinetic energy
3. thermal energy helps in breaking the intermolecular bonds between the particles
4. particles start vibrating more vigorously due to thermal energy