A 2-kg mass that weighs 20 N has 40 J of potential energy relative to the ground. What is its height?
A) 1 m
B) 2 m
C) 3 m
D) 4 m
E) none of the above
Answer: B
Physics & Space Science
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A person has a mass of 45 kg. How much does she weigh on the Moon, where g = 1.62 m/s2?
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When the equation Sb2S3 + HCl ? SbCl3 + H2S is balanced, the coefficient of H2S is
a. 3. b. 1. c. 2. d. 4.
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A charge of +2 C is at the origin. When charge Q is placed at 2 m along the positive x axis, the electric field at 2 m along the negative x axis becomes zero. What is the value of Q?
a.
?3 C
b.
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c.
?7 C
d.
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