Ch.1-1 Nature of our Surroundings Matter and Energy Sources of Ionizing Radiation
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
X-rays are most like:
gamma rays
The milligray in air (mGyt) relates to which of the following?
ions produced in the air
Which of the following is a unit of mass?
kilogram
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 the largest source of human exposure to man-made radiation?
medical diagnostic x-rays
Which of the following contributes more than 1 mGyt per year to each of us?
radioisotopes in nuclear medicine
Energy is defined as:
the ability to do work
The milligray in tissue is related most closely to which of the following
the gray
When ionization occurs, which of the following is true?
the positive ion is the resulting atom
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
What is the approximate annual effective dose from natural environmental radiation at sea level?
100 mrem/yr (1 mSv/yr)
