Low levels of ionizing radiation

a. are dangerous to the human body.
b. can be tolerated by the human body.
c. are beneficial to the human body.
d. none of the above


b

Physics & Space Science

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X-ray and ?-ray NDT detect differences in _________in materials.

Fill in the blank(s) with the appropriate word(s).

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In an elastic collision between two bodies of equal mass, with body 2 initially at rest, body 1 moves off at angle ? relative to the direction of its initial velocity and body 2 at angle ?. The sine of the sum of ? and ?, sin(? + ?), is equal to

A. 0. B. 0.500. C. 0.707. D. 0.866. E. 1.00.

Physics & Space Science

For driving voltage , the current through the resistor is ? ? ?

A.

.

B.
.

C.
.

D.
.

E.

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In a laser the emitted light is __________

Fill in the blank(s) with correct word

Physics & Space Science