The search for life in the solar system that is similar to life on Earth is essentially a search for
A) organic molecules
B) liquid water
C) molecular oxygen
D) energy sources
B
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A satellite is held in orbit by a 3000-N gravitational force. Each time the satellite completes an orbit of circumference 80,000 km, the work done on it by gravity is:
a. 2.4 × 10^8 J b. 2.4 × 10^11 J c. 9.6 × 10^11 J d. 0
Our most detailed knowledge of Uranus and Neptune comes from:
A) spacecraft exploration. B) the Hubble Space telescope. C) ground based visual telescopes. D) ground based radio telescopes. E) manned missions.
A car is going around a racetrack at constant speed. The curves around the track have different radii. In which turn is the magnitude of the car's acceleration the greatest?
a. It is the greatest in the turn with the greatest radius. b. It is the greatest in the turn with the smallest radius. c. The acceleration is zero everywhere because of the constant speed. d. More information is needed to determine the answer.
Solenoid: In order to trap the starship Enterprise, the diabolical Klingons build a huge ideal solenoid 10 light-years long with a diameter of 2.0 million kilometers. Every kilometer of length of the solenoid contains 100 turns of wire. What magnetic field strength is produced near the center of the solenoid using a current of 2.00 kA? (?0 = 4? × 10-7 T ? m/A)
Fill in the blank(s) with the appropriate word(s).