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Yash dayal
Yash dayal
Asked: January 18, 2025In: Class-11-Physics

What is thermal convection? Briefly explain how are convection currents set up in water? Distinguish between natural and forced convections.

Convection is the transfer of heat through a fluid (liquid or gas) by the movement of the fluid itself. When the fluid is heated, it expands becomes less dense and rises. The cooler fluid then sinks to take its place. ...

class 11 physicsconvectionthermal properties of matter
  • 1 1 Answer
  • 41 Views
  • 0 Votes
  • 1
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Yash dayal
Yash dayal
Asked: January 18, 2025In: Class-11-Physics

Describe some applications of conductivity in daily life.

Thermal conductivity is the property of a material to conduct heat. It depends on the material’s nature temperature and structure. Good conductors like metals have high thermal conductivity while insulators like wood and rubber have low conductivity. The unit of ...

class 11 physicsconductivitythermal properties of matter
  • 1 1 Answer
  • 28 Views
  • 2 Votes
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Yash dayal
Yash dayal
Asked: January 18, 2025In: Class-11-Physics

What do you mean by variable state and steady state in thermal conduction? Define temperature gradient.

Thermal conduction is the transfer of heat within a substance without the movement of its particles. It occurs due to the transfer of kinetic energy between neighboring molecules or atoms. Metals are good conductors as they have free electrons while ...

class 11 physicsthermal conductionthermal properties of matter
  • 1 1 Answer
  • 51 Views
  • 1 Vote
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Yash dayal
Yash dayal
Asked: January 18, 2025In: Class-11-Physics

Define heat current and thermal resistance. Write mathematical expressions for them in terms of thermal conductivity K.

Conductivity is the property of a material to allow the flow of heat or electricity through it. Thermal conductivity measures heat transfer, while electrical conductivity measures electric current flow. Good conductors like metals have high conductivity, enabling efficient transfer, while ...

class 11 physicsconductivitythermal properties of matter
  • 2 2 Answers
  • 35 Views
  • 2 Votes
  • 1
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Yash dayal
Yash dayal
Asked: January 18, 2025In: Class-11-Physics

What is the effect of pressure on the boiling point of a liquid. Explain it with the help of a simple experiment.

Pressure is the force exerted per unit area on a surface. It is a scalar quantity measured in pascals in the SI system. Pressure can arise from liquids gases or solids and plays a key role in various phenomena like ...

class 11 physicspressurethermal properties of matter
  • 1 1 Answer
  • 25 Views
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