Any location on the Moon is sunlit for three weeks and is in darkness for one week as the Moon rotates
a. True
b. False
Indicate whether the statement is true or false
False
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Stars within a cluster that are at the turnoff point
a. have life expectancies that are equal to the age of the cluster. b. are stars that are just becoming white dwarfs. c. are stars that are just entering the main sequence portion of their evolution. d. are stars that are about to supernova. e. are stars that are generally spectral type G stars.
Two white dwarf stars are the same size, but one has a surface temperature twice as hot as the other. The hotter star will radiate
a. half as much energy per second as the cooler star. b. the same amount of energy per second as the cooler star. c. four times as much energy per second as the cooler star. d. sixteen times as much energy per second as the cooler star.
To help keep buildings cool in the summer, dark colored window shades have been replaced by light colored shades. This is because light colored shades:
A. are more pleasing to the eye B. absorb more sunlight C. reflect more sunlight D. transmit more sunlight E. have a lower thermal conductivity
Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Approximately what beat frequency is produced?
A) 0.1 hertz B) 1.0 hertz C) 2.0 hertz D) 3.0 hertz E) 4.0 hertz