A teaspoonful of white dwarf material on Earth would weigh
A) a few pounds.
B) about the same as Mt. Everest.
C) a few grams.
D) a few tons.
E) about the same as the Earth.
D
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The center of our galaxy is located in the direction of the constellation of Orion
a. True b. False Indicate whether the statement is true or false
Resolution: Astronomers are proud of their telescopes and often say they can "resolve a dime at so many miles." How many miles from a 102-cm-diameter telescope mirror can you place a coin of diameter 3.0 cm and just resolve the coin using light of wavelength 389 nm? (1 mi = 1.609 km)
A. 19 mi B. 9.7 mi C. 40 mi D. 190,000,000 mi
In a vacuum the speed of light waves compared to the speed of radio waves is
A. faster B. slower C. the same
Doug hits a hockey puck, giving it an initial velocity of 6.0 m/s. If the coefficient of kinetic friction between ice and puck is 0.20, how far will the puck slide before stopping?
a. 14 m b. 19 m c. 9 m d. 11 m e. 24 m