Which of the following is a relatively large moon of Pluto?
A) Charon
B) Europa
C) Triton
D) Titan
A
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The Sun's life time is 10 billion years. About how long is the lifetime of a star with a star has a mass of 0.1 MSun and a luminosity of 0.01 LSun?
A) 1 billion years B) 100 million years C) 100 billion years D) 10 million years
Discuss the population, size, and types of galaxies we find in our Local Group
What will be an ideal response?
A photograph of the two-dimensional elastic collision of two particles shows a particle of mass m1 approaching a stationary particle of mass m2
As a result of their interaction, the incident particle moves away along a line that makes an angle of 30° with its original path, and the other particle moves away along a line that makes an angle of 30° to the other side of the original path of the incident particle. What is the ratio of the masses, m1/m2? A) 0.5 B) 1 C) 2 D) 3 E) 4
A rock is thrown directly upward from the edge of the roof of a building that is 66.2 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown
Neglect any effects of air resistance. With what speed was the rock thrown?