Why does a piece of watermelon stay cool for a longer time than sandwiches do when both are removed from a picnic cooler on a hot day?

Q: Woollen clothes are poor conductor of heat but they keeps us warm. Give reason

A: Woolen clothes are thin and there is no much air gap between the fabric. The air pockets lying in…

Q: Cite three ways in which a Thermos bottle inhibits heat transfer.

A: Construction of thermos is as shown in the figure. Coffee is stored in an internal container as…

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: Why does decreasing the temperature of a liquid make it freeze?

A: As the temperature of a liquid decreases, the randomness in the motion gets decreased. Freezing…

Q: When putting ice in a glass of water, is it the ice that cools the water or the water that warms the…

A: Since heat transfer from higher temperature to lower temperature. Water has more temperature then…

Q: When a superheated liquid is agitated, which of the following may occur? *

A: When a superheated liquid is agitated then bubble formation occurs.

Q: Why does the temperature of boiling water remain the same as long as the heating and boiling…

A: The temperature of the boiling water will not exceed 100°C as long the heating and the boiling…

Q: Why does blowing over hot soup cool the soup?

A: Evaporation causes cooling of liquid as highly energetic molecules get wiped off the surface when…

Q: How does specific heat relate to how fast a substance changes temperature?

A: The heat loss, ∆H, from a substance of mass m and specific heat s, is related to the change in…

Q: Cite three examples in which Thermos bottle inhibits heat transfer?

A: The Thermos bottles use thermal isolation to prevent the transfer of the thermal energy or heat.

Q: Does a substance that cools off quickly have a high or low specific heat capacity?

A:

Q: Adding the same amount of heat to two different objects does not necessarily produce the same…

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Q: When exercising in the heat: O A. It is especially important to stay hydrated O B. You should wear…

A: When exercising in the heat, option A that is to be hydrated is true because of the heat that…

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: When an air molecule is hit by an approaching faster-moving molecule, does its rebound speed…

A: Given:  an air molecule is hit by an approaching fast moving molecule

Q: In summer cotton dresses should be preferred, Why?

A: Step 1During summers everyone tends to perspire a lot as a mechanism of our body to keep us cool.…

Q: If a cool cup of water is floated inside of a pot of water that is already boiling, will the water…

A: If  cup is conductor of heat the water can boil when its temperature reaches to 100 degree celsius.…

Q: Old-time kitchen lore suggests that things cook better (evenly and without burning) in heavy…

A: heavy cast-iron pots

Q: Since all the objects emit energy to the surroundings, why don't the temperature of all the objects…

A: An object which is a good energy emitter will be also very good absorber. Such bodies are said to be…

Q: What is the reason for ice being less dense than water?

A:

Q: The same amount of heat flows into two non-identical bowls of soup, which are initially at the same…

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Q: What generally happens to the temperature of rising air and sinking air?

A: If the Air sinking down compresses air at the surface, raising temperatures near the ground. The…

Q: When you remove a cold beverage from a refrigerator in a humid room, water vapor will condense on…

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Q: Many tongues have been injured by licking a piece of metal on a very cold day. Why would no harm…

A:

Q: Cite two reasons why firewalkers don't burn their wetted feet when walking barefoot on red hot…

A: The conductivity of red hot coal is very low. They conduct heat at a very slow rate. When the…

Q: Hot sand cools off faster at night than plants and vegetation. Then, the specific heat capacity of…

A: Given Hot sand cools off faster at night than plants and vegetation. We have choose the correct…

Q: Which is more painful, burn caused by condensing steam or burn caused by boiling water at the same…

A: Given:- Which is more painful, burn caused by condensing steam or burn caused by boiling water at…

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

A:

Q: what happens as the temperature of an object increases?

A: It is very general scenario with various effects on the body and exhibited by the body. In layman…

Q: An old method for breaking boulders was to put them in a hot fire and then to douse them with cold…

A: This is because of sudden thermal expansion and contraction

Q: Why doesn't energy added to boiling water increase the temperature of the water?

A: When the water is boiling, it is on the course of undergoing a phase transition from its liquid…

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: What happens to the temperature of a pan of water when evaporation exceeds the condensation?

A: Evaporation and condensation can take place simultaneously. Evaporation causes cooling. This is…

Q: Heat flows from one body to another when they have O a. different heat contents. O b. different…

A:

Q: Consider two nearby houses of quite different sizes. At mid-morning on a hot summer day, all the…

A: Conduction of heat Conduction of heat through a medium is                          proportional to…

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: On cold, clear nights horses will sleep under the cover of large trees. How does this help them keep…

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Q: How does the temperature of water change when it is placed in a freezer and then begins to freeze?

A: Refrigeration is a process where any object placed inside a refrigerator cools down while we provide…

Q: Why does the boiling temperature of water decrease when the water is reduced under pressure, such as…

A: A substance starts boiling when the vapor pressure of the substance overcomes the ambient pressure.

Q: How are you quickly able to bring a pan of water to a boil when water is poor conductor of heat?

A: The conductivity of water is less than that of most metals but greater than that of air. Even though…

Q: When you blow up a balloon, do you slightly warm the balloon? When air is allowed to rush out of it,…

A: Let us assume the gas to be ideal and the ideal gas equation reads, All the symbols have their…

Q: Does heat flow into cold areas or does cold flow into hot areas?

A: Yes heat flows from hot to cold area or we can say it moves with the help of particle or atom. for…

Q: Do water and ice have same specific heats?

A: The specific heat capacity is the amount of heat energy desired to increase the temperature of a…