Note the changes taking palce in the internal environment of the body, when a person goes from resting state into a state of physical activity.

State the relation between change in internal energy with work

When is a transistor said to be in active state ?

When an electron in hydrogen atom is raised from the ground state to an excited state its

An office room contains about 2000 moles of air. The change in the internal energy of this much air when it is cooled from 34 °C to 24 °C at a constant pressure of 1.0 atm is ( Use gamma_("air")=1.4 and universal gas constant=8.314 J/mol K)

Name the following : The tendency of a body to resist change in a state of rest or state of motion .

A person's state of physical, mental and social well being.

State the relation between change in internal energy with heat exchanged.

Is the frequency of wave changes when it goes from one medium to another medium ?

Read the following paragraph and answer the questions: If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing gue to loss of energy. The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses haet energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistance box (meaning that the energy exchange takes place between the two objects only ), then no energy can flow from inside the box or come into the box. How will you state the principle briefly?

A body slides down in a time ‘f from rest along a smooth inclined plane making an angle of 45° with the horizontal. When the same body slides down from rest along a rough inclined plane of same length making the same angle, it takes time ‘pt then the coefficient of friction between the body and the rough plane is (p is a constant)