States of Matter Notes Questions with Answers PDF Download - 67

The mist we see when water boils is actually steam that has

1. converted into the water
2. cooled in air
3. become clouds
4. none of the above

The acceleration due to free fall does not depend on the

1. material
2. shape
3. size
4. all of the above

A heating fan supplies thermal energy at constant rate of 1000 W is immersed completely in a 2.5 Kg of block of ice at 0 °C. The ice block takes 1150 s to melt fully. What is the value for the specific latent heat?

1. 1.58 × 10⁵ J Kg^-1
2. 2.9 × 10⁵ J Kg^-1
3. 3.7 × 10⁵ J Kg^-1
4. 4.2 × 10⁵ J Kg^-1

A force of 1 newton is roughly the amount of force the Earth's gravity pulls on a

1. 10 g mass
2. 1000 g mass
3. 100 g mass
4. 200 g mass

A man pushes a carton of 30 kg with a force of 60 N. The acceleration of the box would be

1. 0.5 ms^-2
2. 2 ms^-2
3. 90 ms^-2
4. 1800 ms^-2