Why will wrapping a bottle in a wet cloth for an outing often produce a cooler bottle than placing the bottle in the bucket of cold water?

Q: Why more viscous oil is used in motor car in summer than in winter?

A: More viscous oil is used in motor cars in summer than in winter because in summer, due to the rise…

Q: What happens when an object at a high temperature touches an object at lower temperature?

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Q: Why is a calorimeter box made up of Copper?

A: A calorimeter box is made up of Copper because i) Cu has low SHC & thus it reaches the…

Q: A beaker full of hot water is placed on a wooden table. Does it lose heat? If yes in what ways?

A: Yes, the hot water in the beaker will lose heat.

Q: On a chilly 10°C day, your friend who loves cold weather says she wishes it were twice as cold.…

A: Here, 10°C in Kelvin = 10+273 = 283 K         -131.5°C in Kelvin = -131.5+273 = 141.5 K

Q: Why is wet sand at a beach cooler to walk on than dry sand?

A: Walk on the wet sand

Q: It’s a hot day, and your apartment is rather warm. Your roommate suggests cooling off the apartment…

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Q: How does the kind of material of the calorimeter affect the cooling of the liquid samples?

A: The change in temperature of the liquid is dependent on the material of the calorimeter. A liquid…

Q: If an inflated tyre bursts , the air issuing out is cold, why?

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Q: Icecream appears colder to the mouth than water at 0 degree C. Give reason.

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Q: When can you add heat to something without raising its temperature?

A: When water is heated, the temperature rises till 100oC and then it boils. After this point, the…

Q: Which is the smaller temperature increment - a degree Celsius or a degree Fahrenheit? Explain.

A: You see that Celsius has 100 degrees between the freezing and boiling point, whereas Fahrenheit has…

Q: In terms of thermal expansion, why is it important that a key and its lock be made of the same or…

A: Given: Key and lock

Q: Why does an iron ball seem to have a lower temperature than a wooden ball despite having the same…

A: iron ball seem to have a lower temperature than a wooden ball despite having the same temperature

Q: How does the latent heat of fusion of water help slow the decrease of air temperatures, perhaps…

A: The latent heat of water below zero degree Celsius (ice) is 334 J/g. the amount of latent heat of…

Q: Which will normally warm faster - a black pot of cold water or a silvered pot of cold water?…

A: The black pot of cold water will normally warm faster than the silvered pot of cold water.

Q: Is it the boiling of water or the higher temperature of water that cooks food faster in a pressure…

A: Food can be cooked more quickly in a pressure cooker.

Q: A block of wood and steel is placed in a thermally stable room, which one has a lower temperature?,…

A: Wooden and steel block both are placed in a thermal stable room.

Q: If air is a bad conductor of heat, why do we not feel warm without clothes?

A: Air is a bad conductor of heat because molecules are not close together as in solids. Thus, heat…

Q: Is there more than one method of heat transfer? If so, then how are they similar and different than…

A: Heat is the transfer of energy from one medium to another. The heat can be transferred by:…

Q: Air is a bad conductor of heat , but still we donot feel warm without clothes, Why?

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Q: When you step out of a swimming pool on a hot , dry day in the southwest , you feel quite chilly.…

A: When heat flows from our body, we feel chilly.

Q: When heat flows from a warm object in contact with a cool object., do both objects undergo the same…

A: No

Q: When I sit by a campfire, how does its hot air heat me?

A: When you sit by a campfire, most of the heat you are receiving from the fires does not come from hot…

Q: On a cold windy day, a window will feel colder than on an equally cold day with no wind. This is…

A: Concept: The temperature of two systems is the same when the systems are in thermal equilibrium,…

Q: Which warms up faster when heat is applied- iron or silver?

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Q: In times past, on a cold winter night, it was common to bring a hot object to bed with you. Which…

A: For iron Specific heat is 0.46 kJ/kgK and for water specific heat is 4.186 kJ/kgK Since mass and…

Q: What happens to the temperature of water as it is boiling?

A: BOILING: Boiling is the process by which a liquid turns into a vapor when it is heated to its…

Q: In terms of thermal expansion, why is it important that a key and its lock be made of same or…

A:

Q: If equal amounts of heat are added to different masses of water, their temperatures go up the same.…

A:

Q: Why does a piece of watermelon stay cool for a longer time than sandwiches do when both are removed…

A: Given:  watermelon and sandwiches

Q: Make a contrast between a boot that is chilly and a boot that is warm.

A: We have to find the difference between a chill boot and a warm boot.

Q: Does it necessarily mean that, when an object feels colder than another, the object has a lower…

A: The temperature is the degree of hotness or the coldness of a body.

Q: Can there be any heat transfer between two bodies that are at the same temperature but at different…

A: Heat transfer is a branch of thermal physics that concern with the transfer of heat from one body to…

Q: Explain why a cold day a concrete floor feels colder to the bare foot done a mat on the same floor

A: Heat transfer between mat and concrete floor.

Q: Does a common electric fan cool the air in the room? If not then why it is used an overly warm room?

A: A fan doesn’t cool the room but it only recirculates the air in the room and the air inside is…

Q: Why is there a need for a quick transfer of the hot shots into the water in the calorimeter?

A: The transfer hot shots into the water in calorimeter should be done as quick as possible.

Q: Distinguish between a calorie and a joule?

A: Both calorie and joule are the units of energy. The main difference in both the units is that a…