Question

Tick (7) the correct option.
1. One calorie is nearly equal to
(a) 1/4.2 J
(b) 1 J
(c) 4200 J
(d) 42)
2.
One litre of water at 20°C mixed with the same volume of water at 40C. The temperature of
the mixture will be
(a) between 20°C and 40°C
(b) 60°
(c) between 40°C and 60°C
(d) 20°C
3. The temperature scale that has lower fixed point at 0°C and the upper fixed point at 100°C is called
(a) Celsius scale (6) Kelvin scale (c) Fahrenheit scale (d) Absolute scale
4. Solids transfer heat by
(a) convection
(b) conduction (c) radiation
(d) all the three​

Answer 1

Explanation:

1. 4.2joule

2.20°c

3.celsius scale

4.conduction

Answer 2

1. 4.2 joules
2. between 20 to 40°c
3. Celsius scale
4. conduction