Exoplanets are
A. minor planets in the Asteroid belt.
B. another name for dwarf planets.
C. the outermost planets in our Solar System.
D. planets around stars other than the Sun.
Answer: D
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A factory siren indicating the end of a shift has a frequency of 90.0 Hz
(a) What frequency is perceived by the occupant of a car traveling towards the factory at 25 m/s? (b) What frequency is perceived by the occupant of a car traveling away from the factory at 30 m/s?
The point of a planet's orbit farthest from the Sun is called the ______________
Fill in the blank(s) with correct word
After Mars, the next most likely candidates for life in the solar system are
A) comets in the Kuiper-belt. B) the large moons of the Jovian planets. C) the atmospheres of the Jovian planets. D) the largest asteroids. E) comets in the Oort cloud.
During operation of a nuclear reactor, the 238U nuclei
A) absorb neutrons, which causes them to turn into plutonium. B) slow down the neutrons, thus improving the efficiency of the reactor. C) absorb neutrons, which causes them to turn into fissionable 235U. D) absorb neutrons, which slows down the chain reaction and thus controls the reaction. E) are fissioned by the neutrons, thus releasing nuclear energy.