An astronaut has landed on another planet and conducts an experiment to determine the acceleration of gravity on that planet. She uses a pendulum 0.640 m long and determines that the period of oscillation is 2.60 s
What is the acceleration of gravity on that planet? A) 4.85 m/s2
B) 1.66 m/s2
C) 3.74 m/s2
D) 2.39 m/s2
E) 9.81 m/s2
C
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Do the constellations visible in the sky at a particular time of night (say 9 pm) follow a seasonal pattern?
a. No, the same constellations are visible at 9 pm on any clear night of the year. b. No. As the year progresses, the constellations visible at 9 pm are the same but their shapes change. c. Yes, at 9 pm during a clearwinter night ALL of the constellations you can see are different from the ones that appear at the same time during a summer night. d. Yes, at 9 pm during a summer night most of the constellations you can see are different from those you can see on a winter night. However, there are some constellations that are visible all year long.
A string with a mass per length of 2.00 g/m is stretched between two points that are 0.400 m apart. The third mode frequency of the stretched string is 120 Hz higher than the fundamental mode frequency. What is the tension in the string?
A. 75.0 N B. 96.0 N C. 101 N D. 120 N E. 134 N
A baseball is hit almost straight up into the air with a speed of about 20 m s.
(a) How high does it go? (b) How long is it in the air?
How does degeneracy pressure differ from thermal pressure?
A) Degeneracy pressure continues to be felt even if an object becomes cold, but thermal pressure is drastically reduced as an object gets cold. B) Degeneracy pressure cannot support an object against the crush of gravity, but thermal pressure can. C) Degeneracy pressure can arise in a plasma, but thermal pressure cannot. D) Degeneracy pressure affects stars, but thermal pressure does not.