The SI unit of force is ........ .

The product of force and velocity is the ........ .

The rate of doing work is ........... .

In British engineering system, the power of motors and engines are also expressed in .......... .

1 hp is equal to ........... ergs⁻¹.

There are........ W in 1 hp.

The unit watt is the same as .......... .

The mechanical advantage of a machine depends on the........ present.

The .......... is the ratio of the load to the effort.

The velocity ratio is usually much greater than........ .

If the machine is ........... the mechanical advantage will be equal to the velocity ratio.

The ability to retain the original form is called.......... .

A spring obeys ......... law.

The force applied to an elastic body is called .......... .

One ......... equals to a rate of energy transfers force from place to place,

The ......... of a machine is always less than 100%.

A hydraulic system transfers force from place to place, using ............ .

A compressed spring has ......... energy.

......... is the energy transfered in any system when a force causes movement.

Potential energy and kinetic energy are types of ......... .

An object of mass 'm' raised to a height '2h' above the ground level possesses a gravitational potential energy of .......... .

Work done must have the same unit as .......... .

The normal atmospheric pressure at sea level is .......... .

The normal atmospheric pressure at sea level is......... kNm⁻².

The atmospheric pressure in the plains is ......... that of the hilly regions.

Manometer is a device used to measure the ........... .

A ........... is a device for measuring atmospheric pressure.

When bodies are immersed in a liquid, there is loss in ........... .

Archimedes' principle is true ........ .

The densities of different substances can be obtained by ........ .

The construction of a hydraulic brake and hydraulic press are based on .......... .

The ......... are used to measure the density of liquid.

For a body is in equilibrium in a fluid, the upward thrust is ........... the weight of the body.

If the weight of the body is ......... the upward thrust, the body will sink.

If the weight of the body is........ the upward thrust, the body will rise up to the surface.

The atmospheric pressure at the hilly region is ......... that at the plains.

An air ship is floating high above the ground. In this case the air upward thrust is .......... that airship weight.

The pressure exerted by the liquid column is independent of the......... .

The area of input piston must be ........ the area of output piston in hydraulic press.

A man and a child are standing side by side.They have same ......... .

Barometer was invented by ......... .

There are .......... different modes by which heat may be transferred from one place to another.

The rate of heat flow depends on T₂-T₁/l is called ........... .

Air and body tissue are good ........ of heat.

Cloths, plastic and wood are poor ........ of heat.

By one mode of heat transfer called ........., a much larger quantity of heat may be carried by the motion of the fluid itself.

The weather is fair at the sea coast due to heat .......... process.

In cold regions where rooms are heated by fire 🔥, heating is done by ......... process.

Heat is transmitted from the sun 🌞 to the earth by ........... .

The air trapped in woollen fibres acts an/a ......... .

Plastic and wood are......... conductors.

The SI unit of total emissive power is .......... .

No material medium is required for the passage of ........... waves

A blackbody ........... heat better than a shiny one.

A white shawl wrapped around a baby keeps the baby warm because the swawl ....... .

Thermal radiation or .......... radiation is a form of electromagnetic radiation.

Every object including the sun emits energy in the form of.......... radiation.

Heat transfer from the sun 🌞 to the earth is neither by condition nor .......... .

The shiny objects are the best......... of heat.

The range of wavelength of thermal radiation is about.......... .

The total emissive power of a black body is directly proportional to the fourth power of.......... temperature.

Transfer of thermal energy by means of currents in fluids is termed as............ .

Air conditioners are a best example of .......... .

Process in which thermal energy is transferred without any flow of medium is termed as ........... .

Thermal energy can be transferred by ........ .

Convectional current only occurs in ........ .

Handle of soldering iron rod is made up of plastic because plastic is a ..........

Surface that would better absorbs the infrared radiation is...........

Greenhouse is a good example of..........

If we feel no cold or hot , we call it ....... .

The radiation law is expressed in terms of the fourth power of the....... temperature.