Temperature

Q.

Convert the following temperatures to the Celsius scale.

1. $300\mathrm{K}$

Q.

Convert the following temperatures to the Celsius scale.

${25}^{\circ }\mathrm{C}$

Q.

Write down the relationship between Celsius, Fahrenheit, and Kelvin scales of measurement of temperature.

Q.

Why is it impossible to reach $0Kelvin$?

Q. A thick glass tumbler cracks immediately when we pour hot water into it. This example is governed by which principle?

1. Thermal expansion of solids
2. Thermal expansion of liquids
3. Thermal expansion of gases
4. Anomalous expansion

Q.

What is the standard unit of measuring temperature?

Q. $1^{\circ }C$ rise in temperature is equal to a rise of.

1. $1^{\circ }F$
2. ${\frac{9}{5}}^{\circ }F$
3. ${\frac{5}{9}}^{\circ }F$

Q.

Convert the following Celsius temperature into Kelvin temperature:$-15°\mathrm{C}$

Q.

Two bodies of specific heats ${\mathrm{c}}_1$and ${\mathrm{c}}_2$having same heat capacities are combined to form a single composite body. What is the specific heat of the composite body?

1. $\frac{{\mathrm{c}}_1-{\mathrm{c}}_2}{2{\mathrm{c}}_1{\mathrm{c}}_2}$

2. $\frac{{\mathrm{c}}_1+{\mathrm{c}}_2}{2{\mathrm{c}}_1{\mathrm{c}}_2}$

3. $\frac{2{\mathrm{c}}_1{\mathrm{c}}_2}{{\mathrm{c}}_1+{\mathrm{c}}_2}$

4. $\frac{2{\mathrm{c}}_1{\mathrm{c}}_2}{{\mathrm{c}}_1-{\mathrm{c}}_2}$

Q.

Define heat energy:

a) on conventional basis

b) on the basis of kinetic theory of matter

Q. Which of the following scale(s) is/are used for temperature measurement?

1. Celsius
2. Fahrenheit
3. Kelvin
4. Radian

Q.

When two bodies A and B are in thermal equilibrium, then

1. The internal energy of the two bodies will be equal

2. The kinetic energy of all the molecules of A and B will be equal

3. The potential energy of all the molecules of A and B will be equal

4. The average kinetic energy of the molecules of the two bodies will be equal

Q.

Define temperature and write its S.I.unit.

Q. For a hot object and a cold object, what can we say about the movement of their molecules?

1. The molecules of both the objects are equally active.
2. The molecules of hot object are more active.
3. The molecules of cold object are more active.
4. The molecules of cold object are not active at all.

Q. The expansion in area is called__________.

1. linear expansion
2. superficial expansion
3. cubical expansion
4. chemical expansion

Q.

How does pouring hot water over a metal lid on a glass jar make it easier to open the jar?

Q.

The increase in length of a rod on heating depends on.

1. its initial length

2. its rise in temperature

3. all the above

4. its material

Q. We understand 'temperature' as a measure of the 'hotness' or 'coldness' of a body. Which of the following quantities changes with a change in temperature?

1. Mass of a solid body.
2. Length of a metal rod.
3. Density of a liquid.
4. Pressure of a gas kept in a closed chamber.

Q. The expansion in volume is called__________.

1. superficial expansion
2. linear expansion
3. chemical expansion
4. cubical expansion

Q.

Convert the following temperatures to the Celsius scale.

(b) $470\mathrm{K}$

Q.

How do bugs see humans?

Q.

Convert the following temperature to the celsius scale.

$293\mathrm{K}$

Q.

Give reason:

Telephone and electric wires placed overhead are always left a bit loose.

Q. Which of the following are the units for measuring temperature?

1. Kelvin
2. Joule
3. Calorie
4. Celsius

Q.

On the Celsius scale the absolute zero temperature is at:

1. 0°C

2. - 32°C

3. 100°C

4. - 273.15°C

Q.

Define temperature with measurement unit.

Q.

An iron cork is fitted in a hole on the brass plate. What will be the effect on the fitting of the cork both are heated equally.

Q.

A body X is in thermal equilibrium with Y and Y is in thermal equilibrium with Z, then

1. X is in thermal equlibrium with Z

2. X can never be in thermal equilibrium with Z

3. X and Z can be in thermal equilibrium with each other, but it depends on their material.

4. Thermal equilibrium happens only at 20 degree celsius

Q.

Two bodies are said to be in thermal equilibrium if they have equal

1. temperature
2. heat energy
3. mechanical energy

Q.

What is the S.I. unit of temperature?