Thermal expansion questions | form three Physics

Bimettalic strips bend when heated beacause metals:
A. become softer when heated
B. expand in opposite direction
C. have different expansivities
D. have same expansivities

Heat is _______ while temperature is ____

The temperature of 2kg of a metal block was raised from 40°C to 90°C. The heat energy used was 38,000J. Calculate the specific heat capacity of the metal

A railway mechanical engineer wants to eliminate thermal expansion effects on the rails. The engineer should:
A. avoid thick rails
B. avoid stainless iron rails
C. leave rail supports unscrewed
D. leave space between the rails

Which of the following liquids does NOT contract if cooled from 4°C to 0°C?
A Milk B Pure oil C Pure water
D Kerosene E Sea water.

When a liquid changes into a gas at a constant pressure, the temperature is known as its
A absolute zero
B boiling point
C evaporation point
D dew point
E melting point
 

Define the following terms:
(i) Coefficient of superficial expansion.
(ii) anomalous expansion of water.

(i) How much he at is needed to change 340g of ice at 0° C to water at 0° C?
(ii) What is the name of heat lost by ice in (b) (i) above?

An iron rivet of radius 8.95mm at 20° C is to be inserted into the hole of iron plate of radius 8.92mm at 20°C. What temperature must the rivet be heated in order to fit into the hole?

A brick at 20°C has a dimension of 30 cm, 18 cm and 10 cm for length, width and height respectively. If a brick is heated to a new temperature of 150°C, calculate the new dimensions.