Question

D. Answer the following questions in brief.
. In which direction does the transfer of heat normally take place?
What is the cause of heat generation in the following situations:
(a) We apply brakes on our fast moving car.
(b) People often jump up and down to feel warmer in cold weather.
3. State two types of physical changes that may take place when a substance is
heated.
In what way(s) does a clinical thermometer differ from an ordinary thermometer?
5. State the mode/different modes, of heat transfer, in the following situations.
(a) A paper cup, full of hot soup, lying on a table.
(b) Cooking vegetables in a pan.
(c) Melting of a chocolate bar, in the school bag, on a hot day.
(d) Cooking food in a microwave oven.​

Answer 1

Answer:

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Answer 2

Answer:

Ques 1: In which direction the transfer of heat normally takes place? Transfer of heat takes place from an object of high temperature to another object having low temperature. This will happen until the heat equilibrium is created between both the objects.