Question

please give me right answer.....​

Answer 1

Answer:

1)

a) 300 - 273 = 27 degree celcius

b) 573 - 273 = 300 degree celcius

2)

a) at 250 degree celcius the physical state of water is its vapour form i.e water vapour

b) at 100 degree celcius the physical state of water is both liquid as well as vapour form

3)Temperature of any substance remains constant because the heat supplied to increase the temperature is utilised in changing the state of matter. this is because of latent heat.

4)We should prefer cotton clothes in summer because cotton clothes absorb sweat and expose it outside where it dries and gives us a cooling effect. Cotton clothes have pores which allow proper aeration of the body.

5)When we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surface of the palm to compensate for the loss of energy, making the surroundings cool. Hence, our palm feels cold when we put some acetone or petrol or perfume on it.

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