RRB Group-D Model Paper 18 with answers for online practice

Question : 42 of 100

Marks: +1, -0

The SI unit of heat is

Solution:

Heat is the energy that is transferred from one body to another as the result of a difference in temperature.
The S.I unit of heat is Joule.
One joule equals the work done (or energy expended) by a force of one newton acting over a distance of one meter.
A calorie is the amount of heat needed to raise the temperature of one gram of water by one degree Celsius.
A kilocalorie is equal to one thousand calories.
The erg is equal to $10^{−7}$ joules. It is the unit of energy or work in the cgs system.

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