Food and fuels like oil, gas, coal etc are concentrated stores of
Potential energy
Kinetic energy
Electrical energy
Chemical energy
The unit of pressure is
Newton
Joule
Pascal
Hertz
A mixture of methane and carbon dioxide gas is
Fossil fuel
Biogas
Natural gas
All the above
In a body, the whole mass is concentrated at a point called
Fulcrum
Lever
Centre of gravity
Moment
The energy possessed by a body by virtue of its motion is called
Solar energy
Frictional force has maximum value when
A body starts to move
A body is sliding over another body
A body has maximum temperature
A body has minimum temperature
The percentage of the energy supplied to a device is called
Power
Work done
Fuels
Efficiency
Which of the following is needed to enable people, computers, machines and other devices to do work ?
Energy
Energy transfer
Pressure depends on the
Density of the liquid
Mass of the liquid
Weight of the liquid
Position of the liquid ( vertical or horizondal )
The force which opposes one surface moving over another is
Pull
Push
Friction
