Equipment Chapter 3

1 kilohertz (kHz) is equal to:

1,000 hertz

1 megahertz (mHz) = _____________

1,000,000 hertz

radioactive elements:

1. have excess energy in their nuclei 2. emit particles and energy 3. trying to become stable elements

the half-life of technetium-99m is 6 hours. how many unstable atoms will remain after 12 hours?

1/4 its original amount

what is the wavelength of electromagnetic radiation if the frequency is 3x10^10m?

1x10^-2m

alpha particles consist of:

2 protons and 2 neutrons

what is the frequency of electromagnetic radiation if the wavelength is 1x10^-4 m?

3x10^12 Hz

microwaves travel at a velocity of:

3x10^8 m/s

radio waves are used in:

MRI (magnetic resonance imaging)

an object we see as black is _________ all of the wavelengths of visible light

absorbing

particulate radiation includes:

alpha and beta particles

when considering the wave properties of electromagnetic radiation, the max height of a wave is:

amplitude

an ion pair is:

an atom and the electron that was removed from it

the formula E=hf demonstrates that:

as frequency increases, energy increases

gamma rays are produced

by unstable atoms

as the wave's frequency increases, the wavelength:

decreases

as the wave's wavelength increases, its frequency:

decreases

the inverse square law relates the intensity (of light/x-rays) to:

distance

different electromagnetic radiation are put in order by the:

electromagnetic spectrum

a negatively charged beta particle behaves the same as an:

electron

in the formula E=hf, energy is measured in:

electron volts

in the formula, E=hf, E represents:

energy

(T/F) all of the electromagnetic radiation are capable of ionizing matter

false

(T/F) all radioactive elements occur naturally

false

(T/F) electromagnetic energy cannot travel through a vacuum

false

(T/F) higher energy radiation acts more like waves than like particles

false

(T/F) the beta particles is an electron that is emitted from an outer shell

false

in the formula, E=hf, f represents:

frequency

when considering the wave properties of electromagnetic radiation, the number of waves that pass by a given point in 1 second is:

frequency

as compared to an alpha particle, a beta particle:

has less mass

electromagnetic radiation:

has no mass

alpha and beta particles are similar to x-rays and gamma rays in that they:

have the energy to ionize matter

an alpha particle is the same as the nucleus of an:

helium atom

frequency is typically measured in:

hertz

the electromagnetic radiation that passes between the TV remote and the TV is:

infrared light

the process of removing an electron from an atom is called:

ionization

electromagnetic theory was developed in the late 1800s by:

maxwell

electromagnetic radiation causes both ________ and _______ disturbances

mechanical and electrical

wavelength is generally measured in:

meters

when compared with a beta particle, the alpha particle is:

much larger

when the alpha particle picks up 2 electrons as it passes through air it becomes a:

neutral atom of helium

in the formula, E=hf, h represents:

planck's constant

the positively charged beta particle is an:

positron

which of the following electromagnetic radiation have the lowest energy level?

radio waves

the general process of a radioactive element giving off excess energy and particles to regain stability is:

radioactive decay

an object we see as white is _______ all of the wavelength of visible light

reflecting

which of the following is not part of the electromagnetic spectrum?

sound

electromagnetic radiation is a form of energy that originates from:

the atom

x-rays and gamma rays differ in:

the energy source that produces them

half-life is:

the rate at which a radioactive material decays

when the formula v=fy is changed to c=fy, the c represents the constant symbol for:

the speed of light

(T/F) all electromagnetic radiation travels at the speed of light

true

(T/F) electromagnetic radiation has properties of a wave and a particle

true

(T/F) x-rays and gamma rays are the only electromagnetic radiation that is able to ionize matter

true

the electromagnetic radiation used in tanning beds is:

ultraviolet light

x-rays are produced by

using fast-moving electrons

microwaves heat up food because their energy causes the atoms and molecules to:

vibrate

when considering the wave properties of electromagnetic radiation, the distance from the peak of one wave to the next is the:

wavelength

the formula c=fy can be used to calculate the ______ and _____ of an electromagnetic wave

wavelength and frequency