Ch.1-1 Nature of our Surroundings Matter and Energy Sources of Ionizing Radiation

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Which of the following examples best represents energy?

a thrown snowball

Which of the following results in the highest annual radiation dose?

diagnostic x-rays

Radiation is:

energy transferred

Which of the following is ionizing electromagnetic radiation?

gamma rays

Which of the following is a unit of mass?

kilogram

Which of the following contributes more than 1 mGyt per year to each of us?

radioisotopes in nuclear medicine

In Einstein's famous E=mc(squared) equation, c stands for which of the following?

the speed of light

Which of the following is an example of electromagnetic radiation?

visible light

Which of the following items is considered to be matter?

wet snow

X-rays are most like:

gamma rays

The milligray in air (mGyt) relates to which of the following?

ions produced in the air

Energy is defined as:

the ability to do work

Which of the following is the principal difference between mass and weight?

mass is the equivalence of energy; weight is the force exerted by gravity

Which of the following is an example of potential energy?

a mobile x-ray imaging system in motion

When ionization occurs, which of the following is true?

the positive ion is the resulting atom

The milligray in tissue is related most closely to which of the following

the gray

What is the approximate annual effective dose from natural environmental radiation at sea level?

100 mrem/yr (1 mSv/yr)

Which of the following is the largest source of human exposure to man-made radiation?

medical diagnostic x-rays


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