Question

1. Why are two persons in space unable to hear each other?

2. Why are newly made quilts warmer than old ones?

3. What is the other name of a thermos flask?

4. Name the device that converts chemical energy to electrical energy.

5. Which is the sure test for a magnet?

6. What constitutes current?​

Answer 1

Answer:

1) The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. If you are sitting in a space ship and another space ship explodes, you would hear nothing.

2) A new quilt is warmer because the air which is trapped inside the cotton or woolen clothing acts as an insulator and does not allow the transfer of heat. However, when the quilt gets older, the air spacing of the cotton or wool gets compressed it no longer remains a good insulator

3)A vacuum flask

4)battery

5)Repulsion

6)Flow of free electrons constitute the current.