The diameter of the parietal bone is used to estimate the age of the fetus. This measurement measures
A. Head width
B. Length of the head
C. Ratio of width to length
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The energy of the X-ray is
A. a) About the same as infrared, which is why it causes burns.
B. b) The lowest energy EM radiation known
C. c) High enough to cause damage to the DNA in cells
D. d) Similar to the ultraviolet light that causes sunburn
At what speed do radio waves travel?
A. a) The same speed as light.
B. b) The same speed as sound.
C. c) The same speed as sound and light.
D. d) Faster speed than light.
In which direction does an electromagnetic wave propagate?
A. a) The same as the electric field.
B. b) Opposite to the magnetic field.
C. c) Perpendicular to the electric and magnetic field.
D. d) Sinusoidally.
MIP rotational reconstructions rotate
A. clockwise.
B. anticlockwise.
C. either way, you can't tell.
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