Random 1
A battery produces _________ current.
direct
What is the maximum # of electrons that can be held in the third electron?
a. 2
b. 8
c. 18
d. 32
c. 18
What is most similar to an alpha particle?
1. A helium nucleus containing two protons and two neutrons
2. An electron emitted from the nucleus
3. A proton emitted from the nucleus
4. A neutron emitted from the neutron
1. Helium nucleus contains two protons and two neutrons
What is the SI unit for time?
second
Where do gamma rays come from?
the nucleus
The force on a body caused by the pull of gravity on it is called
weight
The spontaneous emission of particle and energy to become stable.
Radioactivity
Which of the following is a method of heart transfer?
a. Conduction
b. Convection
c. Radiation
d. all the above
d. All the above
Current that changes direction in the conductor is __________.
alternating current
Which of the following is NOT a base quality?
a. Length
b. Mass
c. time
d. Velocity
d. velocity
A scale of measurement; water freezes at 0 degrees
Anders Celsius
An x-ray tube cools primarily through the process of
a. Radiation
b. Convection
c. Conduction
d. None of the above
a. Radiation
The time required for a quality of radioactivity to be reduced to one-half its original value.
Radioactivity half-life
First thermometer - 32 degrees
Gabriel Fahrenheit
Meters per second squared (m/s2) is the unit of measure of
a. Velocity
b. Momentum
c. Force
d. Acceleration
d. Acceleration
All electromagnetic radiation travels at the same speed.
A. True
b. False
a. true
Every object in the universe attracts every other object
Law of gravity
The half-life of technetium-99m is 6 hours. How many unstable atoms will remain after 6 hours?
A. One sixth of the original amount
b. one fourth of the the original amount
c. One third of the original amount
d. Half of the original amount
d. Half of the original amount
Photons with the highest frequencies have the
a. Highest velocity
b. Lowest energy
c. Longest wavelengths
d. Shortest wavelengths
d. Shortest wavelengths
How much force is needed to move a move a 30-kg piece of equipment at a rate of 3 m/s 2?
A. 10 N
B. 90 N
C. 60 N
d.30 N
b. 90N
1 megahertz (MHz) is equal to:
a. 100 hertz
b. 1000 hertz
c. 1,000,000 hertz
d. 1,000,000,000 hertz
c. 1,000,000 hertz
X-rays are usually identified by their _____________.
a. Energy
b. Wavelength
c. Velocity
d. Hertz
b. Wavelength
Rubbing a rubber rod with fur is an example of electrification by _____________.
friction
Particulate radiation includes:
a. Alpha particles
b. X-rays particles
c. Beta particles
d. A and C
e. All the above
D. A and C
When there is movement of some of the electrons of an uncharged metallic object as its brought into the electric field of a charged object, this is electrification by ___________.
induction