Which of the following was discovered by Galileo Galilei?
A) The mountains and valleys on the surface of the Moon
B) The planets Uranus and Neptune
C) The planets being in elliptical motion around the Sun
D) The other galaxies in the Universe
A
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Kinetic Energy: How much kinetic energy does a 0.30-kg stone have if it is thrown at 44 m/s?
A. 290 J B. 580 J C. 440 J D. 510 J
As a spaceship moving toward you at half the speed of light fires a probe toward you, relative to itself at 0.7 the speed of light, you see the probe approaching at about
A) 0.70c. B) 0.87c. C) 0.89c. D) 0.92c. E) 0.96c.
Hot steam that issues from a pressure cooker expands and
A) increases in temperature. B) can cause severe burns. C) cools. D) all of the above E) none of the above
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)