Question 1

What is a light ray?

Accepted Answer

can be produced by a ray-box or a laser pointer

Accepted Answer

an arrow used to represent the path of light

Accepted Answer

a column of light

Answer

can be reflected by luminous objects

Question 2

Which of the following(s) is/are the correct description(s) of temperature?

Accepted Answer

It is the measure of the hotness of an object

Accepted Answer

It is the average kinetic energy of the molecules of an object

Accepted Answer

The lower fixed point of temperature is -273 Degree Celsius which is the absolute zero

Answer

The temperature of vacuum is 0

Question 3

All images are virtual when we view an object using our eyes.

Answer

true

Question 4

What is internal energy?

Accepted Answer

Total amount of potential energy of molecules inside an object

Accepted Answer

Total amount of kinetic energy of molecules inside an object

Answer

Total amount of heat energy of molecules inside an object

Answer

Total amount of kinetic, heat, kinetic energy of molecules inside an object

Answer

Total amount of all kind of energy inside an object

Question 5

We can transfer heat energy through heating

Answer

true

Question 6

All kinds of thermometer such as liquid-in-glass thermometer and liquid crystal thermometer are used to measure temperature.

Answer

true

Question 7

Which of the following quantities must be specified in defining the fixed points in Celsius scale

Accepted Answer

The air pressure

Accepted Answer

The light intensity

Answer

The humidity

Answer

The thermometric materiel of the thermometer

Question 8

Power is the rate of heat energy transferred.

Answer

true

Question 9

The unit of power is J

Answer

true

Question 10

The potential energy of water are always constant

Answer

true

Question 11

liquid-in-glass clinical thermometer uses mercury as the thermometric liquid.

Answer

true

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