A rem (roentgen equivalent in man) is defined as (the product of)
a. the dose in RBE.
b. the dose in roentgen and the RBE factor.
c. the dose in rad times the dose in roentgen.
d. the dose in rad and the RBE factor.
e. the dose in rad and energy of radiation.
d
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Chemically based extraterrestrial life
A) will not need to store information B) may not use DNA to store information but will very likely use a molecule with a similar function C) will certainly use DNA to store information, but with different nucleotides D) will certainly use DNA to store information
Enormous filaments of excited gas arching over the Sun's surface and extending hundreds of thousand of kilometers outward are called
a. sunspots. b. solar flares. c. prominences. d. coronal arcs.
Compared to a soft sound, the speed of a loud sound is
1) less, 2) greater, 3) the same, and compared to low-frequency sound, higher-frequency sound travels 4) more slowly. 5) faster. 6) the same speed.
Triton's source of internal heat is mostly associated with
A) tidal heat associated with its elliptical orbit around Neptune B) tidal heat left over from it being captured into orbit around Neptune C) radioactive decay D) heat left over from its formation