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✔✔In winter woolen clothes blankets and quilts filled with cotton are used? Give reason why it is so


Help me with a perfect reason ❌❌No spamming

2.. What is parallel glass slab and series slab write its derivation too

3... What is Newton law of cooling

4.. What is thermodynamics and its first , second and Zeroth law

5...What is Convection and explain convection experimental


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Answer 1

1️⃣$\huge\boxed{Question}$

In winter woolen clothes blankets and quilts filled with cotton are used? Give reason why it is so

$\huge\boxed{Answer}$

• Cotton clothes are thin and do not have space in which air can be trapped. Thus, cotton clothes do not prevent heat coming out of our body. Woollen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.

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2️⃣$\huge\boxed{Question}$

What is parallel glass slab and series slab write its derivation too

$\huge\boxed{Answer}$

• Parallel glass slab:- In a rectangular glass slab, the emergent ray is parallel to the incident ray but they are not along the same line whereas in a prism the emergent ray is not parallel to the incident ray.

This is because in a glass block the two surfaces at which refraction occurs is parallel to each other.

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3️⃣$\huge\boxed{Question}$

What is Newton law of cooling

$\huge\boxed{Answer}$

• Newton's law of cooling states that the rate of heat loss of a body is directly proportional to the difference in the temperatures between the body and its surroundings.

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4️⃣$\huge\boxed{Question}$

What is thermodynamics and its first , second and Zeroth law

$\huge\boxed{Answer}$

Thermodynamics :-

• the branch of physical science which deals with the relation between heat and other form of energy

First law of thermodynamics:-

• internal energy of a system can be increased by supplying heat to the system and by doing work on the system
• heat supplied to the system is positive
• heat released by system is negative

Second law of thermodynamics:-

• according to second law of thermodynamics entropy of universe is increasing continuously

• ∆S(Universe) > 0

Zeroth law of thermodynamics:-

• The zeroth law of thermodynamics states that if two thermodynamic systems are each in thermal equilibrium with a third one, then they are in thermal equilibrium with each other. Accordingly, thermal equilibrium between systems is a transitive relation.

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5️⃣.$\huge\boxed{Question}$

What is Convection and explain convection experimental

$\huge\boxed{Answer}$

Convection:-

• Convection is a type of heat transfer that can only happen in liquids and gases, because it involves those liquids or gases physically moving.

Experimently we can observe Convection by:-

• boiling a water in open container

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Answer 2

Explanation:

1.Cotton is hollow, so it traps air, air provide resistance for transfer of heat. another reason is the clumping of wool.

2. A hard brittle transparent or translucent noncrystalline solid, consisting of metal silicates or similar compounds. It is made from a fused mixture of oxides, such as lime, silicon dioxide, etc., and is used for making windows, mirrors, bottles, etc.

3.Newton's Law of Cooling states that the rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature (i.e. the temperature of its surroundings).

4.The most important laws of thermodynamics are: The zeroth law of thermodynamics. When two systems are each in thermal equilibrium with a third system, the first two systems are in thermal equilibrium with each other.

5.Convection is a type of heat transfer that can only happen in liquids and gases, because it involves those liquids or gases physically moving. Convection happens when there is a difference in temperature between two parts of a liquid or gas. The hot part of a fluid rises, and the cooler part sinks.

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