Physics
The first law of thermodynamics is simply the case of

The law of conservation of energy
The law of heat exchange
Charle's law
Newton's law of cooling

ANSWER DOWNLOAD EXAMIANS APP

Physics
Inside an aeroplane, flying at a high altitude,

normal humidity and partial vacuum are maintained.
the pressure inside is less than the pressure outside.
the pressure is the same as that outside.
normal atmospheric pressure is maintained by the use of air pumps.

ANSWER DOWNLOAD EXAMIANS APP

Physics
A dynamo is used to convert

Mechanical energy into electrical energy
Magnetic energy into mechanical energy
Electrical energy into magnetic energy
Electrical energy into mechanical energy

ANSWER DOWNLOAD EXAMIANS APP