Imagine we have a planet identical to Jupiter around another star, with the exception that its orbit is much closer. How would its density compare to Jupiter?
A) it would be slightly higher
B) it would be much higher
C) it would be lower
D) it would be the same
C
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Light from the sun is illuminating a fish in the water. The sun is at 45° relative to a perpendicular to the water surface. What is the angle of the suns rays in the water relative to a perpendicular to the water surface?
What will be an ideal response?
What do peculiar velocities reveal?
A) the amount of dark matter in a galaxy B) the distribution of dark matter in large-scale structures C) the composition of dark matter D) the error in our observations of Hubble's law E) the critical density of the universe
Consider an LRC series circuit. The impedance of the circuit increases if XC increases. When is this statement true?
A) always true B) true only if XL is less than or equal to XC C) true only if XL is greater than XC D) true only if XL is equal to XC E) never true
A ceiling fan is turned on and reaches an angular speed of 132 rev/min in 20 s. It is then turned off and coasts to a stop in an additional 40 s. The ratio of the average angular acceleration for the first 20 s to that for the last 40 s is which of the following?
a. 6.6 b. 6.4 c. ?0.15 d. ?2.0