To neglect the energy dissipated in friction

To supply more output energy than it is given as input energy

To exert a large force by application of relatively small one

To convert a rapid movement into a slow one

To transmit force or torque for accomplishes a definite purpose

using spectacles with concave lens for myopia

using spectacles with concave lens for hyperopia

using bi-focal spectacles for presbyopia

by using spectacles with cylindrical for astigmatism

by using spectacles with convex lens for myopia

it is a digital probe thermometer

it can get reading in 1 to 3 minutes

it can be used in the ear

some models are more expensive

it can be used to measure temperature as contact with the person

The angle between magnetic field and the surface area is zero

The angle between magnetic field and the surface area is 90˚

The angle between magnetic field and the normal is 90˚

the magnetic field is exactly parallel to cross-sectional area

the magnetic field is exactly perpendicular to cross-sectional area

superconducting coil produce a flux density of between 1 and 2T.

produces a very small electromagnetic signal at the Larmor frequency

relies on the magnetic properties of the electron

external magnetic field is applied to the hydrogen atom in our body

the protons de-excite: they return to the original state and emit RF signals.

to measure threshold of hearing

to determine the quality of a sound

to measure heart beat

to detect the movement of the chest of a young fetus

to determine the velocity of blood flow

a measure of average molecular potential energy

a measure of average molecular kinetic energy

indicator of the direction of heat energy flow

indicator of the direction of kinetic energy and potential energy flow

indicator of the direction of internal energy flow

Defibrillator is the standard items of emergency equipment

An artificial pacemaker can produce repetition rate of 60 to 70 per minute

Electrocautery is performed by a hand piece

ECG is a recording of electrical signals produced by the brain

EEG is most widely used of the bioelectric measurements

Hydrogen is compressible fluid

the simplest pressure gauge is the sphygmomanometer

surface tension is the force in the surface acting normally per unit length across any line in the surface of a liquid

according to Archimedes' Principle the buoyant upward force can be greater than the weight of floating body

the inside pressure is less than the outside pressure of a soup bubble

the body is cooled by convection using ice

cold compresses are used as heat source

food protect the body from certain diseases

heat source can not be applied directly to the skin

cryosurgery probe can be used to destroy living cell