On its icy surface, Uranus's satellite Ariel has smooth valleys with few craters. Other areas are rough with many craters. Based on this, it can be concluded that
a. valleys are young and the rough areas are old.
b. the valleys are old and the rough areas are young.
c. both valleys and rough areas are young.
d. both valleys and rough areas are old.
a
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Stars are eternal and unchanging in your lifetime but not over a star's lifetime
a. True b. False Indicate whether the statement is true or false
If Sirius transits my local meridian tonight at 6:43 PM, when will it transit tomorrow?
What will be an ideal response?
Two charges that are separated by one meter exert 1-N forces on each other. If the magnitude of each charge is doubled, the force on each charge is
A) 1 N. B) 2 N. C) 4 N. D) 8 N. E) none of the above
Tensile Stress and Strain: Which one of the following is an accurate statement?
A. The ratio of tensile stress to tensile strain is called Young's modulus. B. "Strain" has a meaning very close to "force." C. "Stress" has a meaning very close to "stretch." D. Tensile stress is measured in newtons. E. Tensile strain is measured in meters.