Question

How long will a 1.2 kW electric kettle take to heat 0.8 kg of water from 20°C to 100°C?

Answer 1

A person decides to loose weight by eating only cold food. A 100 g piece of apple pie yields 1500 kJ of energy when eaten. It its specific heat is 1.7 kJ/kg °C, how much less energy is its energy component at 5°C than at 25°C?

Answer 2

3.687 min