Which of the following was NOT a contribution of Galileo to astronomy?
A) Sunspots showed the Sun was rotating on its axis, like the Earth does.
B) The four moons of Jupiter are a model for the solar system motions in general.
C) The phases of Venus prove it orbits completely around the Sun.
D) The changing appearance of Saturn's rings corresponds to our seasons.
E) The craters and mountains of the Moon prove it a world in its own right.
D
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One ampere × one second is a unit of
a. power. b. current. c. voltage. d. electric charge. e. resistance.
Find the magnetic energy stored in the air gap between two very large magnetic pole pieces, one North, one South, each with an area of 100 cm2 . Assume the 0.05 T magnetic field is uniform within the 2-cm gap
The Kepler mission uses which technique to detect planet candidates?
A) Radial velocity measurements B) Direct imaging C) Measurements of transverse motion D) Planetary transits
While Debbie Diver holds her breath and swims deeper and deeper beneath the water's surface, her density
A) increases. B) decreases. C) remains the same.