Flow of Heat

Q.

Explain the phenomenon of land breeze and sea breeze with diagrams. [5 MARKS]

Q.

The vertical movement of air is called

1. a) Wind

2. b) Storm

3. c) Air current

4. d) drift.

Q.

A cold spoon dipped in a cup of hot milk transfers heat to its other end by the process of ____________.

Q.

There is a change in the size of the body due to heating.

1. True
2. False

Q.

Which of the following best describes the second law of thermodynamics?

1. Energy can neither be created nor destroyed

2. At absolute temperature, the entropy of a perfect crystal is zero

3. When an isolated system undergoes a spontaneous change, the entropy of the system will increase.

4. The internal energy of the universe is constant

Q.

In countries like USA and Canada, the temperature is measured in Fahrenheit, whereas in countries like India, it is measured in Celsius. Here is a linear equation that converts Fahrenheit to Celsius: $F=\left(\raisebox{1ex}{$9$}\!\left/ \!\raisebox{-1ex}{$5$}\right.\right)C+32$. Is there a temperature which is numerically the same in both Fahrenheit and Celsius? If yes, find it.

Q.

Temperature gives us the direction of flow of heat.

1. False

2. True

Q.

Heat is a kind of fluid that flows from a hot object to a cold object.

1. True
2. False

Q.

What do you mean by thermal equilibrium? How does the concept of thermal equilibrium help us to define temperature?

Q. The direction of flow of heat between two bodies is determined by

1. Average kinetic energy
2. total energy
3. potential energy
4. internal energy

Q.

Heat is a kind of energy that flows from a hot body to a cold body.

1. True
2. False

Q.

Due to conduction, the heat of an object can be felt from a distance.

1. True
2. False

Q. State whether given statement is True or False
Heat always flows from a body at lower temperature to a body at higher temperature.

1. True
2. False

Q. Heat always flows from higher temperature to lower temperature.

1. True
2. False

Q. In countries like $USA$ and Canada, temperature is measured in Fahrenheit, Wheres in countries like India, it is measured in Celsius. Here is a linear equation that converts Fahrenheit to Celsius:
$F=\left(\frac{9}{5}\right)C+32$
If the temperature is ${30}^{\circ }C$, what is the temperature in Fahrenheit ?

Q. In radiation, the heat energy from hot body to cold body, travels in the form of

1. Longitudinal as well as transverse waves
2. Transverse waves
3. Longitudinal waves
4. Corpuscles

Q.

How Does Conduction Work Simple?

Q. Utensils become hot after cooking because

1. heat flows from the body at higher temperature to the body at lower temperature.
2. rate of heat flow is constant.
3. Both A and B
4. Neither A nor B

Q. Heat is a form of energy that flows between two bodies due to _________ in their temperatures.

Q. To cool a glass containing hot milk, what needs to be done?

1. Place it in hot water
2. Place it in hot honey
3. Place it in cold water
4. Place it on gas

Q.

what is meant by THERMAL RADIATIONS EXIHIBIT THE phenomenon of INTERFERENCE , DIFFRACTIONS AND POLARIZATION??

Q. 1 calorie is heat required to increase the temperature 1 gm of water by $1C$ from

1. $13.5C$ to $14.5C$ at $760mm$ of $Hg$
2. $14.5C$ to $15.5C$ at $760mm$ of $Hg$
3. $0Cto1C$ at $760mm$ of $Hg$
4. $3C$ to $4C$ to $760mm$ of $Hg$

Q. The above figure shows a glass tumbler containing hot milk which is placed in a tub of cold water. State the direction in which heat will flow.

Q. Heat flows from an object of ____ temperature to an object of ____ temperature.

1. higher, lower
2. lower, higher
3. higher, even higher
4. some, same

Q. 1 kg ice at - 10${}^{0}C$ is mixed with 1kg water at ${50}^{0}C$. Then correct options are :

1. equilibrium temperature = $0^{0}C$
2. mass of water in mixture $[1+\frac{45}{80}]$kg
3. mass of ice in mixture $[1-\frac{45}{80}]$kg
4. mass of ice in mixture = 1kg

Q.

which thermodynamic variables is defined by zeroth law?

Q. When two bodies at different temperature on coming in contact with one-another attain same temperature, the heat given out by the ------------ body is equal to the heat absorbed by the ---------- body.

1. cold, hot
2. cold, heat
3. none of the above
4. hot, cold

Q. The rate of loss of heat from a body cooling under conditions of forced convection is proportional to its (A) heat capacity (B) surface area (C) absolute temperature (D) excess of temperature over that of surrounding: state if

1. Only D is correct
2. A, B, C are correct
3. Only B and D are correct
4. Only A and C are correct

Q.

Heat energy can be grouped under the general heading:

1. Potential energy

2. Kinetic energy

3. Both (A) and (B)

4. None of the above

Q. When we any liquid in the fridge for a long time it doesnt form to ice, but, when we keep a liquid in the freezer, it forms to ice. Why does that happen ?