Our most detailed knowledge of Uranus and Neptune comes from:
A) spacecraft exploration.
B) the Hubble Space telescope.
C) ground based visual telescopes.
D) ground based radio telescopes.
E) manned missions.
A
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An observer in the Northern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?
a.
straight north
b.
straight east
c.
straight south
d.
straight west
e.
straight up, directly overhead
A uniform piece of wire, 20 cm long, is bent in a right angle in the center to give it an L-shape. How far from the bend is the center of mass of the bent wire?
A) 2.5 cm B) 3.5 cm C) 4.5 cm D) 5.0 cm E) 7.1 cm
Answer the following statement(s) true (T) or false (F)
1. Suppose we add a certain amount of energy to a quanton in a box, increasing its energy from 
. Adding the same amount of energy again will increase its energy to 
.
2. Suppose we add a certain amount of energy to a simple quantum harmonic oscillator, increasing its energy
from 
. Adding the same amount of energy again will increase its energy to 
A large telescope of mass 8410 kg is in a circular orbit around the earth, making one revolution every 927 minutes
What is the magnitude of the gravitational force exerted on the satellite by the earth? (G = 6.67 × 10-11 N ? m2/kg2, Mearth = 6.0 × 1024 kg)