Question

Introduction
We have seen in the previous chapter how air entrapped in the
layers of wool saves the animals from severe cold. Because of the
same reason, we wear woollen clothes during winter. But, can you
explain why you are advised to wear light clothes in summer? You
feel cool while wearing cotton clothes and warm while wearing
woollen clothes.
We feel cold inside the house during winter months but warm when
we come out under the sun. So, how do we feel hot or cold? Let us
now see what heat is.
Heat
Heat is a form of energy. It is transferred by the difference in
temperature. When we rub our hands during winter, the hands
become hot. Here, the mechanical action of rubbing generates the
heat.
In our day-to-day life, we find many things that are hot or cold.
The ice cubes in the refrigerator are cold and the freshly cooked
food is hot. Do you sip from a glass of milk the moment it is served?
No, you wait for it to cool down a bit. You touch the glass with your
palms to know if you can have it. So, to know whether objects are
hot or cold, we rely on our sense of touch. But this can be quite
misleading. Let us perform Activity 1 to understand this.
Wis from the kitchen In the first bowl put some hot water and in the
old water in the third bowl mix hot and cold water
the first bowl, but make sure that it will not burn your hand,
the second bowl. Keep your hands in the bowls for 2 to 3 minutes.
of in the third bowl. How do you feel now?
cold and your nght hand will feel hot But how can this happen?
ce you finish reading this chapter
, you will be able to tell why you felt
&$
Activity 1 proves that we can only tell how cold or hot an object is
with our sense of touch. But we cannot judge how hot or cold the
object is simply with the sense of touch. The most reliable measure
of the hotness or coldness of an object is the temperature of the
object. Thus, temperature is the degree of hotness or coldness of
an object
Units of Temperature
The most common unit for measunng the temperature is degree
Ceistus written as a. On Celsias scale, the melting point of ice is
taken as and the boiling point of water is taken as 100°C
Another mit that is sometimes used for measuring the temperature
is degree Fahrenheit (F). On Fahrenheit scale, the melting point
ofice is taken as 32 and the boiling point of water as 212
It is obvious that 0 - 32 F and 100 - 2129
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Answer 1

Answer:

plzzzz make this question small

Answer 2

Answer:

where is question friend write in proper way