Consider two walls of a house that are identical except that one is made of 10-cm-thick wood, while the other is made of 25-cm-thick brick. Through which wall will the house lose more heat in winter?

Q: Why will wrapping a bottle in a wet cloth at a picnic often produce a cooler bottle than placing the…

A: When a bottle is kept in a bucket of cold water, the bottle is being cooled by the process called…

Q: Which has more heat: 1g of ice at 0 degree C or 1g of water at 0 degree C? Give reason.

A: Latent heat is the measure of the heat energy per mass released or absorbed during a phase change.

Q: Consider laminar forced convection in a circular tube. Will the heat flux be higher near the inlet…

A: In general, the heat transfer coefficient and wall shear stresses are higher at the region where the…

Q: When you open the door to an air conditioned room in the summer are you letting cold air out or hot…

A: When the door to an air conditioned room in the summer is opened.   And we need to tell whether we…

Q: Show that 3000cal= 12,570J , the same quantity of thermal energy in different units.

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Q: The lower surface of a slab of stone of face-area 3600 cm and thickness 10 cm is exposed to steam at…

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Q: Compare the rate of heat conduction through a 13.0-cm-thick wall that has an area of 10.0 m2 and a…

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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: Calculate the amount of heat loss for a 5.08 cm thick glass wall when its temperature changes from…

A: Given, Thickness, t = 5.08 cm = 0.0508 m Temperature changes from 20200C from 400C so ΔT = 200C Time…

Q: Consider two glasses, one filled with water and the other half-full, with the water in the two…

A: The average speed of the molecules depends upon the temperature at which the substance is. Since…

Q: Why does the high specific heat of water have to do with convection currents in the air at the…

A: Water has a high specific heat capacity (of 4200 J/Kg°C) on the seashore and the land has a much…

Q: Why do woolen blankets keep us warm better than cotton sheets?

A: In the woolen blanket, there are more gaps. So, more air are confined within woolen blanket. Air is…

Q: Consider a small pot with an aluminum base. The base has a thickness of 2.0mm and a diameter of 19…

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Q: You know that the windows in your warm house get wet on a cold day. But can moisture form on the…

A: On a cooler day, the window surface will be probably cold enough that condensation will form as the…

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: Suppose you stand with one foot on ceramic flooring and one foot on a wool carpet, making contact…

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Q: Which is largest unit of heat transfer- Calorie, calorie, joule?

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Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: According to given, Total area is given by, A= Area of end walls + Area of ends of attic + Area of…

Q: Why does a two-story house that is roughly a cube suffer less heat loss than a rambling one-story…

A: For a given volume, a one-story house has less surface area than a two-story house. As we know rate…

Q: explain the terms convection and conduction?

A: both conduction and convection are mode of heat transfer.conduction is the process in which transfer…

Q: What examples of heat transfer by conduction, radiation, and convection do you encounter when using…

A: Heat transmission is a straightforward physical process. During the heat transmission process,…

Q: Why are cloudy nights generally warmer than clear ones?

A: Cloud is defined as dense texture of moisture molecules present in the atmosphere.

Q: Why two thin blankets are warmer than a single blanket of double the thickness?

A: Step 1If there are more layers, air can’t pass deeper.

Q: Consider two equal-size rooms connected by an open door. One room is maintained at a higher…

A: Since rooms are identical they have same volume and since the doors are open they have same…

Q: Consider a small pot with a copper base. The base has a thickness of 2.0 mm and a diameter of 15 cm.…

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

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

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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: Compare the rate of heat conduction through a 13.0-cm-thick wall that has an area of 10.0m2 and a…

A: The expression for rate of transfer energy through wall is  Pw=kwAw∆Ttw                   ...... (1)…

Q: If water had a lower specific heat capacity, would ponds be more likely to freeze or less likely to…

A: A lower heat capacity means that less energy must be transferred to result in a temperature change.

Q: If placed in outer space where there is a near vacuum, a heated object will lose almost all of its…

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Q: Compare the rate of heat conduction through a 13.0-cmthick wall that has an area of 10.0 m2 and a…

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Q: In terms of heat flow, explain why silverware feels cold to touch?

A: Answer:-  Metal(silverware) feels cold because it conducts heat extremely well.  Since room…

Q: Why is sweating an efficient mechanism for cooling off on a hot day?

A: There will be evaporation of water and other liquids present on human’s skin into the air. The…

Q: What does the high specific heat of water have to do with convection currents in the air at the…

A: Specific heat capacity is the amount of heat energy required to raise the temperature of unit amount…

Q: The cover of a solar coker is made of glass because:    A) it absorbs sun's rays B) it reflects…

A: The glass always produces the green house effect. It does not allow the smaller wavelength to escape…

Q: Consider a window glass consisting of two 4-mmthick glass sheets pressed tightly against each other.…

A: The rate at which heat transfer occurs when there is a variation in temperature is termed as heat…