Acceleration of Free Fall Notes Questions with Answers PDF Download - 27

The effect of an opposing force to the motion is known as

1. resultant force
2. gravity
3. energy
4. air resistance

The SI unit of frequency is

1. ohm
2. seconds
3. meter
4. hertz

The gravitational force acting per unit mass on the object is known as

1. gravitational field strength
2. gravitational field weakness
3. Earth's power
4. stress

A jet of steam at 150 °C is directed at a large block of ice for some time at 0 °C. Some steam condenses to form water and some ice is melted. The condensed steam forms 0.6 kg of water at 0 °C. The specific latent heat of water is 2200 kJ kg^-1. What is the thermal energy given out by this mass of steam in changing to water at 100 °C?

1. 1320 kJ
2. 1150 Kj
3. 2020 kJ
4. 3666 kJ

Sound waves and pushing and pulling a Slinky are the examples of

1. mechanical waves
2. electromagnetic waves
3. transverse waves
4. longitudinal waves