You observe two distant galaxies (well outside our Local Group of galaxies). You find that Galaxy W is moving away from us at a speed of 35,000 km/s and Galaxy X is moving away from us at a speed of 70,000 km/s. What can you say about the distances to those galaxies?
A) Galaxy W is four times as far as Galaxy X.
B) Galaxy W is twice as far as Galaxy X.
C) She can't say anything about the distances to Galaxy W or X.
D) Galaxy X is four times as far as Galaxy W.
E) Galaxy X is twice as far as Galaxy W.
B) Galaxy W is twice as far as Galaxy X.
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Water runs out of a horizontal drainpipe at the rate of 120. liters per minute. It falls 3.20 m to the ground. Assuming the water doesn't splash up, what average force does it exert on the ground?
A) 12.0 N B) 19.6 N C) 15.8 N D) 8.88 N E) 6.20 N
John is nearsighted and cannot see things beyond 110 cm from his eyes. What is the focal length of the contact lenses that will enable him to see distant objects clearly?
A) +50 cm B) -50 cm C) -110 cm D) +110 cm E) -30 cm
Another name applied to the grain size in a rock is
a. specific gravity. b. porosity. c. texture. d. streak.
Mineral Irons that are carried in solution and are invisible during transport are called
What will be an ideal response?