Solve this Q
Dear Student.
1. T
2. T
3. F
Different solids expand to different extent though the sizes are same. Because the expansion depends on the molecular vibration. As they vibrate differently though the size is same the expansion will occur to different extent.
4. F
Telephone wires are kept slightly loose when they are laid because heat. Heat makes metallic wire expand and cold makes the material shrink. Therefore, without a slack they could become too tight and break in winters or pull loose from their anchors in summers .This is the reason why wires are kept slightly loose when they are laid.
5. T
6. T
7. T
8. F
Radiation is another form of heat transfer. It does not require any medium and can be used for transfer of heat in a vacuum as well.
Regards
1. T
2. T
3. F
Different solids expand to different extent though the sizes are same. Because the expansion depends on the molecular vibration. As they vibrate differently though the size is same the expansion will occur to different extent.
4. F
Telephone wires are kept slightly loose when they are laid because heat. Heat makes metallic wire expand and cold makes the material shrink. Therefore, without a slack they could become too tight and break in winters or pull loose from their anchors in summers .This is the reason why wires are kept slightly loose when they are laid.
5. T
6. T
7. T
8. F
Radiation is another form of heat transfer. It does not require any medium and can be used for transfer of heat in a vacuum as well.
Regards