Which method of astronomical measurement is the precise measurement of brightness?
A) spectroscopy
B) photography
C) astrometry
D) photometry
E) interferometry
D
Physics & Space Science
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Pre-main-sequence stars are above and to the right of the main sequence
a. True b. False Indicate whether the statement is true or false
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Viewed from afar, the transit of Earth would cause the Sun's brightness to dim by approximately
A) 10%. B) 5%. C) 1%. D) 0.00001%. E) 0.01%.
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An iron robot falls from rest at a great height. Neglecting air resistance, what distance has it fallen in the first 3.5 seconds?
A. 49 m B. 60 m C. 98 m D. 31 m
Physics & Space Science
The top quark
a. is the only quark not yet detected experimentally b. has been shown not to exist c. was discovered at Fermilab d. none of the above
Physics & Space Science