Question

G. Give reasons for the following.
1. While laying a rail track, a small gap is left
between two successive rails.
2. Concrete floors are laid in small blocks.
3. The iron rim of a wooden wheel is made a
little smaller in diameter than the wheel.
4. One end of steel girder in a bridge is kepton rollers instead of fixing it.
5. Some empty space is left in sealed wine bottles.
6. Metal pipes used for carrying steam havejoints in the form of loops
Give good answer recive thanks and brainliest
Bad answer than I will report your 5 answers​

Answer 1

Answer:

While laying the railway track, a small gap is left between the two successive length of rails. The reason is that the rails expand in summer. The gap is provided to allow for this expansion. If no gap is left, the expansion in summer will cause the rails to bend sideways.

Explanation:

pls mark brainliest

Answer 2

Answer:

light or visible light commonly refers to the electromagnetic radiation that can be human eye.