A cube of side 'a' rests on the floor as shown in the given figure. Given that the pressure exerted by this cube on the floor is 'P', what is the pressure exerted by another cube of the same material of side '4a'? (Take $g=10 \mathrm{N} {\mathrm{kg}}^{-1}$)

 

The given diagram shows a brick wall between a man and a campfire. How does thermal energy from the campfire reach the man?

United football club is playing an evening match. The team's jersey has blue and white stripes. What colour would the stripes appear under floodlights which produce a yellow light?

The given diagram shows the night sky in which stars are visible. Identify P, Q, R, and S.

The diagram shows a soft iron core coiled with wire.

When the switch is turned on, iron nails are attracted. Which of the following ways, will make the soft iron core to attract all the iron nails?

A car is accelerating on a road in the direction shown in the figure. The tyre shown is connected to the engine. In which direction is the force of friction exerted by the road on the tyre?

Statement $1$: The size of a hydrogen balloon increases as it rises in the air.

Statement $2$: The material from which the balloon is made can be easily stretched. 

Anju walks $8 \mathrm{m}$ to the east, then $6 \mathrm{m}$ to the south, then $8 \mathrm{m}$ to the west, and finally $6 \mathrm{m}$ to the north. What is the distance covered and displacement of Anju?

Deepak put twenty ice cubes of the same volume into four containers packed with different materials. He recorded the time taken for the ice to melt in each case. The table shows his results. Which of these boxes should he choose to carry ice that he needs to take to a friend's house $120 \mathrm{km}$ away?