A rubber rod rubbed with fur becomes
A) positively charged.
B) negatively charged.
C) both
D) neither
Answer: B
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If a satellite is in orbit around Earth and the satellite's altitude is decreased, then the circular velocity __________________
a. decreases b. increases c. stays the same d. is zero
Based on the graph above, a planet with twice the mass of Jupiter would have a radius that is
A) about twice the radius of Jupiter. B) about 5% larger than the radius of Jupiter. C) about half the radius of Jupiter. D) about 10% smaller than the radius of Jupiter.
In a fission reaction, such as occurs in a nuclear power plant,
A) thermal energy and other forms of energy are converted to nuclear energy. B) nuclear energy is converted to thermal energy and other forms of energy. C) heat is converted to work. D) nuclear energy is created. E) energy is created.
A 30-year-old woman takes a trip on a rocket, leaving her 20-year-old brother behind. She travels at a speed of 0.8 c, and is gone 20 years, according to the younger brother. When she returns, how many years older/younger is she than her brother?
a. 2 years younger b. 2 years older c. 3 years older d. 10 years older e. 8 years older