A successful theory of the formation of the solar system must explain:
A) that all planets rotate in a prograde sense.
B) that all planets have elliptical orbits with high eccentricities.
C) the existence of the asteroid belt between Jupiter and Neptune.
D) that the inner planets have more hydrogen and helium in their atmospheres than do the outer planets.
E) all observed properties of the solar system.
E
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Rapidly rotating column of air that is in contact with both the surface of the Earth and cloud
A. Waterspout |
B. Tropical Cyclones |
C. Tornado |
D. Lightning |
E. Great Red Spot |
F. Dust Devil |
If telescope A is 160 cm in diameter, and telescope B is 32 cm in diameter, how much more light does telescope A gather than telescope B?
a. 5 times b. 10 times c. 20 times d. 25 times e. 100 times
A dragster drives a quarter mile (402 m) at a constant rate of acceleration, starting from rest and finishing the race at a final speed of 450 km/hr. If the mass of the dragster is 975 kg, together with its driver, and rolling friction is ignored, what average power was developed by the engine, if 50% of the power developed by the engine was delivered to the wheels?
A. 4.7 MW B. 1.2 MW C. 0.6 MW D. 2.4 MW
Which of the following can change the frequency of a wave?
a. interference b. the Doppler effect c. diffraction d. all of the above