How do the stellar winds of young Sun-like stars compare to the solar wind we see from the Sun today?
a. Young stars don’t have winds.
b. Young stars have weaker winds.
c. Young stars have much stronger winds.
Answer : c. Young stars have much stronger winds.
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If a proton has a kinetic energy of 1.000 GeV, what is its momentum? 
A. 1.938 GeV/c B. 1.000 GeV/c C. 938.0 GeV/c D. 2.872 GeV/c E. 1.696 GeV/c
A bucket in an old well is hoisted upward by a rope that winds up on a cylinder having a radius of 0.10 m. How many rev/s must the cylinder turn if the bucket is raised at a speed of 0.15 m/s?
a. 3.0 rev/s c. 0.48 rev/s b. 1.5 rev/s d. 0.24 rev/s
In keeping with its Greek god, Neptune probably contains a lot of water, in a slushy mantle ocean
Indicate whether the statement is true or false
A baseball outfielder throws a baseball of mass 0.15 kg at a speed of 40 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory?