Question

State two disadvantages of thermal expansion and suggest their solutions

Answer 1

1. derailment of trains due to bending of tracks

SOL.. using fishplates

2. cracking of marbles

SOL.. using marbles with separate blocks

Answer 2

disadvantages

1)coal is a natural resource so it wont renew again

2)thermal plant produces more harmful gasses and leads to global warming

solution

1) instead of thermal power plant we can use alternative methods like solar energy ,wind energy