To date relatively young rocks and materials, we use the decay of
A) uranium-238 to lead-206.
B) potassium-40 to argon-40.
C) carbon-14 to nitrogen-14.
D) uranium-235 to lead-207.
Answer: C
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Fill in the blank(s) with correct word
?Unpolarized light is passed through three successive Polaroid filters, each with its transmission axis at 45.0°to the preceding filter. What percentage of light gets through?
A. ?0% B. ?12.5% C. ?25.0% D. ?50.0% E. ?33.3%
Neutron stars are the size of ________
Fill in the blank(s) with correct word
The primary of an ideal transformer has 100 turns and its secondary has 200 turns. Neglecting frictional losses, if the power input to the primary is 100 W, we can expect the power output of the secondary to be
A) 100 W. B) 50 W. C) 200 W. D) none of the given answers.