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

relies on the magnetic properties of the electron

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

produces a very small electromagnetic signal at the Larmor frequency

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

converging mirror

diverging mirror

concave mirror

convex mirror

plane mirror

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

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

the simplest pressure gauge is the sphygmomanometer

Hydrogen is compressible fluid

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

cold compresses are used as heat source

heat source can not be applied directly to the skin

food protect the body from certain diseases

the body is cooled by convection using ice

cryosurgery probe can be used to destroy living cell

using spectacles with concave lens for myopia

using bi-focal spectacles for presbyopia

by using spectacles with cylindrical for astigmatism

by using spectacles with convex lens for myopia

using spectacles with concave lens for hyperopia

indicator of the direction of kinetic energy and potential energy 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 internal energy flow

Electrocautery is performed by a hand piece

Defibrillator is the standard items of emergency equipment

EEG is most widely used of the bioelectric measurements

ECG is a recording of electrical signals produced by the brain

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

higher fundamental frequency

greater velocity

smaller velocity

the same fundamental frequency

lower fundamental frequency

to measure threshold of hearing

to measure heart beat

to detect the movement of the chest of a young fetus

to determine the quality of a sound

to determine the velocity of blood flow

To neglect the energy dissipated in friction

To exert a large force by application of relatively small one

To transmit force or torque for accomplishes a definite purpose

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

To convert a rapid movement into a slow one