Assessment: Heat and Temperature

Two blocks of the same metal, one twice the mass of the other, are both heated by the same 10°C rise. Which needs MORE heat energy?

Which thermometer type is best suited to measuring the temperature of molten steel from a safe distance?

Find the heat energy needed to raise the temperature of 3 kg of water by 15°C (c = 4200 J/(kg·K)).

Convert 50°C to kelvin.

A copper wire 10 m long at 5°C is heated to 45°C. Find its increase in length (α for copper = 1.7 × 10⁻⁵ K⁻¹).

25,200 J of heat raises the temperature of an unknown mass of water (c = 4200 J/(kg·K)) by 6°C. Find the mass of water.

Normal human body temperature is about 37°C. Convert this to degrees Fahrenheit.

Why can't a normal mercury-in-glass thermometer be used to measure liquid nitrogen at −196°C?

A brass rod is 2.5 m long at 20°C. Heated to 120°C, its length increases by 2.5 mm (0.0025 m). Find the coefficient of linear expansion α for brass.

300 g of water at 90°C is mixed with 700 g of water at 20°C. Ignoring heat loss, find the final equilibrium temperature (heat lost by the hot water equals heat gained by the cold water).