Heat

Answer

The metal spoon will feel hotter. Metals are good conductors of heat, so they transfer heat energy more quickly from hot water to your skin. Wood is a poor conductor, so it transfers less heat energy

Answer

Heat is energy in transit that flows from a hotter body to a colder body. Temperature is a measure of the degree of hotness or coldness of a body. Heat is the energy that flows, while temperature dete

Answer

Given: m = 2 kg, ΔT = 80°C - 20°C = 60°C = 60K, s = 4180 J/kg-K Using Q = msΔT Q = 2 × 4180 × 60 = 501,600 J = 501.6 kJ Therefore, 501.6 kJ of heat is required.

Answer

Water has high specific heat (4180 J/kg-K) because heat energy is used for breaking hydrogen bonds between molecules, not just increasing kinetic energy. Practical implications: Ocean temperature rema

Answer

Thermal equilibrium occurs when two bodies in contact reach the same temperature and no heat flows between them. Example: When you put a thermometer in your mouth, initially heat flows from your body

Answer

The outer covering (bread) has lower specific heat and cools down quickly. The inner filling (vegetables/curry) has higher specific heat capacity due to water content and retains heat longer. This is

Answer

When bodies at different temperatures are brought into thermal contact, net heat lost by hot bodies equals net heat gained by cold bodies until thermal equilibrium is reached. Mathematical form: Heat

Answer

During evaporation, high-energy molecules escape from the liquid surface, leaving behind molecules with lower average kinetic energy, thus cooling the liquid. When we sweat, water evaporates from skin