A cloud fragment too small to collapse into a main sequence star becomes a
A) pulsar.
B) planet of another star.
C) T-Tauri object.
D) brown dwarf.
E) white dwarf.
D
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The inks used in printing the full-color photos in a common magazine are
A) red, green, and blue. B) red, green, blue, and black. C) magenta, cyan, and yellow. D) magenta, cyan, yellow, and black. E) none of the above
A ball rolling down a hill has a constant acceleration of 3 m/s2 . If the ball's mass is 2.5 kg, what is the net force acting on the ball?
Radon gas has a diffusivity of 0.12 cm^2/s into air at 20ºC. If the air temperature is raised to 30ºC, what would you expect the diffusivity to be?
What will be an ideal response?
Which of the following worlds show evidence of dried up rivers and lake beds?
A) the Moon B) Mercury C) Venus D) Mars E) all of the above