Question

1) Why rails have gaps at specific distances.
2) We do not see an image in transparent glass.
3) Why Astronauts on the moon can not hear each other
(B) Answer the following (any 02 ) :
1. State the laws of reflection with the help of diagram.
2. Write the difference between heat and temperature.
3. Write short note on-Respiration.
4. What is the relation between the three units of temperat
3. Answer the following (any 02 )​

Answer 1

Answer:

The gaps left between successive rails on a railway track, 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. That will result in train accidents.