Farsightedness can be corrected with a converging lens
Indicate whether the statement is true or false
TRUE
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You stand on a scale that rests on the floor of an elevator that is accelerating upward. What is the relationship between the force due to gravity
A. N > mg
B. N = mg
C. N
Which of the following statements is an overall summary of the findings from the Viking biology experiments?
A) the martial soil showed no signs of chemical or biological activity B) the Martian soil showed clear signs of biological activity C) the Martian soil is chemically reactive but shows no signs of biological activity D) the Martian soil contained organic molecules but showed no signs of biological activity
Two spectral lines in a spectrum have frequencies of 2.0 x 1014 Hz and 4.6 x 1014 Hz. A higher-frequency line in the same spectrum likely has a frequency of
A) 2.6 x 1014 Hz. B) 6.6 x 1014 Hz. C) 13.2 x 1014 Hz. D) none of the above
The total amount of power (in watts, for example) that a star radiates into space is called its
A) apparent brightness. B) absolute magnitude. C) luminosity. D) flux.