Thermal expansion

Question 1 of 10

Gaps are left between railway lines to

Question 2 of 10

A bimetallic strip bends when heated because the two metals

Question 3 of 10

Water has its greatest density at

Question 4 of 10

A steel rod 10 m long is heated by 50 °C. The linear expansivity of steel is 1.2 × 10⁻⁵ /K. By how much does it expand?

Question 5 of 10

A bimetallic strip is used in a thermostat because

Question 6 of 10

A gas expands more than a solid when heated because

Question 7 of 10

Water has its maximum density at

Question 8 of 10

A brass ring of diameter 4.99 cm at 20 °C is heated to fit a 5.00 cm rod. If α = 2 × 10⁻⁵ /K, the temperature rise needed is about

Question 9 of 10

Telephone wires are left slack in hot weather so that they

Question 10 of 10

A steel rod 1 m long at 20 °C is heated to 120 °C. If α = 1.2 × 10⁻⁵ /K, the new length is