Gravitational lensing can be used to detect the presence of dark matter
a. True
b. False
Indicate whether the statement is true or false
True
Physics & Space Science
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An astronaut traveling with a speed v = 0.90c holds a meterstick in his hand. If he measures its length, he will obtain a value of
A. 1.0 m B. 2.3 m C. 0.19 m D. 0.43 m E. 0.81 m
Physics & Space Science
Size of the Nucleus: If an atomic nucleus containing 64 nucleons has a mass density ?, what will be the expected mass density of a nucleus containing 512 nucleons?
A. ? B. 2? C. 4? D. 8? E. 16?
Physics & Space Science
Jupiter is located approximately 5.2 AU away from the Sun. What is the distance in kilometers?
a. 3.7 x 10^7 km b. 5.2 x 10^8 km c. 1.4x 10^9 km d. 7.8 x 10^8 km e. 8.0 x 10^8 km
Physics & Space Science
Escape speed from the Sun is
A) about the same as from Earth. B) very much greater than for Earth. C) indefinite.
Physics & Space Science