It is most useful type of radiation therapy

It is not suitable for radiation therapy

It has great destructive power.

It is most penetration

It is an electron

it can cause sterility

CT scan is a computer assisted scanning method of gamma rays

it is very energetic and ionization.

from a single atom, radiation of different frequencies could not be produced

the fluorescent plate produce on immediate image

prevents burns of body

lower the body temperature

lift thin wall cysts

perform surgery on the heart

destroy living cell

Break system of a car

Urinometer

hydrometer

Dentists ̓ chair

Operating tables to raise and lower the tables.

Carbon dioxide laser can treat throat cancer

One curie is the activity of 1kg of radium

Argon laser is can remove tattoo without noticeable scarring

The range of alpha radiation is less than a tenth of a millimeter inside the body

Beta radiation is much less hazard if it is injected

wet

low resistance

high resistance

dry

not become part of a circuit

the linear acceleration of a point on the rotating body can also be called the centripetal acceleration

uniform circular motion is a non-periodic motion

when the axis is outside the rotating body, the body revolves

the acceleration of ultra centrifuge is 3×10⁴ times that of gravity

uniform circular motion is accelerated motion

torque

no torque

no lever arm

can not cause torque

a rotation

that is normal to the magnetic field

that is moving exactly parallel to the magnetic field

that is moving an angle to the magnetic field

that is no angle to the magnetic field

at rest

spherical membrane

double layer

cylindrical membrane

alveoli

aorta or capillaries