Radiographic Quality

40 ms = ___ seconds A. 0.40 B. 40,000 C. 40 D. 0.04 E. 4000

0.04

A fluoroscopic examination is conducted using 1.5 A (amperes) of electricity. That is equivalent to: A. 150 mA B. 1500 mA C. 15 mA D. 15,000 mA

1,500 mA

Which of the following numbers is the same as 10 raised to the minus 6th power? A. 1/10,000 B. 1/6 C. 0.6 D. 1,000,000 E. 1/1,000,000

1/1,000,000

If a text book that is suspended 3 feet above your desk possesses 6 joules of potential energy relative to the desk, and is dropped, how much kinetic energy will it have when it reaches a point of 1 1/2 feet above the desk? A. 1.5 joules B. 4.5 joules C. 2 joules D. 1/2 joule E. 3 joules

3 joules

The interactions between all bodies of matter in the universe are governed by ___ different forces. A. 5 B. 6 C. 10 D. 3 E. 4

4

If a text book that is suspended 2 feet above your desk possesses 6 joules of potential energy relative to the desk, and is dropped, how much KINETIC ENERGY will it have when it reaches a point of 1/2 foot above the desk? A. 1.5 joules B. 2 joules C. 3 joules D. 4.5 joules E. 1/2 joule

4.5 Joules

The liquid helium and liquid nitrogen (nitrogen dewars) of an MRI machine, keep its magnetic coils at 4-degrees above: A. freezing B. condensation C. absolute zero D. the boiling point E. room temperature

Absolute zero

Temperature measures the ___ of molecules. A. Average internal energy B. Average external energy C. Average kinetic energy D. Average potential energy

Average kinetic energy

To hold together the nucleus of an atom, the strong nuclear force must overwhelm A. gravity B. electrical force C. radiation D. the weak nuclear force E. the neutrons

Electrical force

As an electron drops into a lower atomic shell, its positional form of potential energy is emitted as a(n) ___ form of potential energy. A. mechanical B. nuclear C. electric D. chemical E. electromagnetic

Electromagnetic

Heat transfer by convection is restricted to: A. liquids B. solids C. fluids D. plasmas E. gasses

Fluids

A substance which occupies a definite volume of space, but does not retain a definite shape would be a: A. fluid B. gas C. resin D. solid E. liquid

Liquid

The only kind of heat transfer that can take place through vacuum space is: A. convection B. temperature C. conduction D. friction E. radiation

Radiation

When snow is formed from droplets of liquid water in a cloud, the surrounding air is: A. unchanged B. greatly cooled C. increases in humidity D. slightly warmed

Slightly warmed

In "closed systems" such as the universe, laws of conservation demand that: A. matter can not be created nor annihilated B. total energy must be equal before and after an event C. force cannot be multiplied D. the potential energy of an object must increase as it drops

Total energy must be equal before and after an event.

Which of the following is NOT a form of energy? A. nuclear B. work C. electrical D. chemical E. thermal

Work

Anything that exerts a "push" or a "pull" such that it can cause a change in the motion of another body may be described as: A. a mass B. pressure C. gravity D. energy E. a force

a force

The wavelength of x-rays used in medical diagnosis may be described as: A. hundreds of angstroms B. several angstroms C. several centimeters D. a fraction of an angstrom E. a fraction of a nanometer

a fraction of an angstrom

In physics, which of the following is a fundamental unit (not a derived unit) A. milliamperes B. meters per second C. centimeters D. mAs E. miles per hour

centimeter

In physics, which of the following is a fundamental unit (not a derived unit): A. milliamperes B. miles per hour C. centimeters D. mAs E. meters per second

centimeter

Condensation, the change in state of matter from gas to liquid, results in a(n): A. decrease in kinetic energy B. increase in kinetic energy C. increase in potential energy D. decrease in potential energy

decrease in potential energy

Heat is defined as the flow of ___ from one substance to another. A. radiation B. temperature C. pressure D. internal energy E. potential energy

internal energy

One correct interpretation of Einstein's famous equation E = mc2 , is that: A. energy cannot be created or destroyed B. it takes an enormous amount of energy to create a very small amount of matter C. absolutely nothing can exceed the speed of light D. atomic bombs require huge amounts of matter to work

it takes an enormous amount of energy to create a very small amount of matter.

The generic unit of energy is the: A. quantum B. mAs C. pound D. volt E. joule

joule

Which of the following represents the conversion of kinetic energy into potential energy : A. lifting a book off of a table B. a running car motor using gasoline C. using chemicals in a battery to make electricity D. "free falling" while skydiving E. knocking an electron out of an atom

lifting a book up off of a table

A million volts would be one A. nanovolt B. megavolt C. gigavolt D. kilovolt E. millivolt

megavolt

One thousandth of a millimeter would be a(n): A. micrometer B. kilometer C. meter D. nanometer E. angstrom

micrometer

The unit of Force (F) is the: A. Volt(V) B. watt(W) C. newton(N) D. joule (J) E. ampere (A)

newton (N)

At the exact moment a liquid changes state from liquid to gas, it changes: A. temperature B. both kinetic and potential energy C. kinetic energy D. potential energy

potential energy

Most of the heat energy produced in an x-ray tube during an exposure is released by: A. condensation B. convection C. conduction D. evaporation E. radiation

radiation

Pascal's Law explains how liquid pumps (such as the human heart and brakes on a car) work: "Applied pressure will be transmitted undiminished throughout any liquid because liquids...": A. expand according to pressure B. have indefinite volume C. have indefinite shape D. resist compression

resist compression

In physics, which of the following is not a fundamental standard of measurement? A. time B. length C. mass D. speed

speed

Which unit is equivalent to one 10-billionth of a meter? A. the angstrom B. the micrometer C. the gigameter D. the nanometer E. the centimeter

the angstrom

If an object is lifted from 10 meters to 20 meters above the ground, it will have: A. the same energy B. twice as much potential energy C. half the kinetic energy D. half the potential energy E. twice as much kinetic energy

twice as much potential energy

In the x-ray tube, an example of heat dispersion by conduction is: A. glowing of the anode disc to "white hot" B. the production of x-rays C. the production of infrared radiation D. warming of the metal shank of the anode E. circulation of oil surrounding an x-ray tube

warming of the metal shank of the anode.