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In winters, rubbing of hands together for some time, causes a sensation of warmth mainly because of
- a)heat caused by the force of friction
- b)heat caused by the momentum
- c)heat caused by the motion
- d)heat flows from the blood to skin
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
In winters, rubbing of hands together for some time, causes a sensatio...
If you rub your hands together for several seconds, you'll notice that your hands feel warm. That warmth is caused by a force called friction. When objects like your hands come in contact and move against each other, they produce friction. Friction happens when you overcome the resistance of one object rubbing against the other. The force of the friction is opposes the direction of the motion. If you just put your hands together, there's no resistance, so there's no friction produced. Rub them together and there's friction.
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In winters, rubbing of hands together for some time, causes a sensatio...
Explanation:
When we rub our hands together in winters, we experience a sensation of warmth. This is primarily due to the heat caused by the force of friction.
Friction:
Friction is the force that opposes the relative motion between two surfaces in contact. When we rub our hands together, the irregularities on the surfaces of our hands come into contact and interact with each other. This interaction results in the force of friction.
Heat caused by friction:
When two surfaces rub against each other, the force of friction converts mechanical energy into thermal energy. This conversion leads to an increase in the temperature of the surfaces involved in the rubbing action. In the case of rubbing hands together, the heat generated by friction warms up our hands and produces a sensation of warmth.
Factors affecting heat production:
The amount of heat produced by friction depends on several factors, including:
- Force of friction: The greater the force of friction, the more heat is produced. When we rub our hands together with more force, a greater amount of heat is generated.
- Speed of rubbing: The faster we rub our hands together, the more heat is produced. This is because increased speed leads to a higher rate of friction, resulting in more heat generation.
Heat transfer:
While heat is produced by friction, it is essential to note that heat flows from warmer objects to cooler objects. In the case of rubbing hands, the heat generated by friction flows from the warmer blood in our hands to the cooler skin surface. This heat transfer helps to warm up the skin and gives us a sensation of warmth.
Therefore, the primary reason for the sensation of warmth when rubbing hands together in winters is the heat caused by the force of friction.
When we rub our hands together in winters, we experience a sensation of warmth. This is primarily due to the heat caused by the force of friction.
Friction:
Friction is the force that opposes the relative motion between two surfaces in contact. When we rub our hands together, the irregularities on the surfaces of our hands come into contact and interact with each other. This interaction results in the force of friction.
Heat caused by friction:
When two surfaces rub against each other, the force of friction converts mechanical energy into thermal energy. This conversion leads to an increase in the temperature of the surfaces involved in the rubbing action. In the case of rubbing hands together, the heat generated by friction warms up our hands and produces a sensation of warmth.
Factors affecting heat production:
The amount of heat produced by friction depends on several factors, including:
- Force of friction: The greater the force of friction, the more heat is produced. When we rub our hands together with more force, a greater amount of heat is generated.
- Speed of rubbing: The faster we rub our hands together, the more heat is produced. This is because increased speed leads to a higher rate of friction, resulting in more heat generation.
Heat transfer:
While heat is produced by friction, it is essential to note that heat flows from warmer objects to cooler objects. In the case of rubbing hands, the heat generated by friction flows from the warmer blood in our hands to the cooler skin surface. This heat transfer helps to warm up the skin and gives us a sensation of warmth.
Therefore, the primary reason for the sensation of warmth when rubbing hands together in winters is the heat caused by the force of friction.
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In winters, rubbing of hands together for some time, causes a sensation of warmth mainly because ofa)heat caused by the force of frictionb)heat caused by the momentumc)heat caused by the motiond)heat flows from the blood to skinCorrect answer is option 'A'. Can you explain this answer?
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