Suppose that Earth's ice caps melted, but everything else about the Earth's surface and atmosphere stayed the same. What would happen to Earth's average surface temperature?
A) The temperature would not be affected at all.
B) The surface temperature would decrease.
C) The surface temperature would increase.
D) The surface temperature would change radically, until it was equal to the melting temperature of ice.
C
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Why isn't the space within our solar system or the Milky Way expanding according to Hubble's law?
A) Hubble's law only applied early in the history of the universe. B) As we are inside our solar system and the Milky Way, we cannot observe their expansion. C) The universe is not old enough for the solar system or Milky Way to have begun their expansion. D) The gravity exerted by the solar system and the Milky Way is strong enough to hold them together against the expansion of the universe.
A cart starts with velocity v and rolls up the frictionless path shown. At what point is the potential energy greatest?
A. 1
B. 2
C. 3
D. 4
The position of an object that is oscillating on an ideal spring is given by x = (17.4 cm) cos[(5.46 s-1)t]. Write an expression for the acceleration of the particle as a function of time using the cosine function
What will be an ideal response?
An X-ray technician takes an average of ten X-rays per day and receives 2.5 mrad per X-ray. What is the total dose the technician receives in 250 working days?
A) 2.50 rem B) 5.00 rem C) 6.25 rem D) 7.75 rem E) 12.5 rem