Question

state the mode/different modes ,of heat transfer , in the following situation (a) a paper cup full of hot soup lying on a table. (b) cooking vegetables in a pan. (c) melting of choclate bar ,in the school ,on a hot day. (d) cooking food in the microwave oven.

Answer 1

Answer:

1. Convection mode : heat is moving in the fluid and gases from high to low temperature.

2. Conduction mode because in cooking vegetables in a pan, pan transfers heat from its surface to the vegetables being cooked

3. Radiation. When temperature increases on a hot day, the chocolate undergoes a physical change and melts.

4. Radiation heat transfer : Microwaves in the oven penetrate the food and causes their molecules to vibrate, which creates heat and cooks the food.