What is the current limit to distances we can measure via parallax, until the results of the new Gaia mission become available?
A) about 100 light years B) about 1000 light years
C) about 100,000 light years D) about 10,000 light years
B
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Which stage of planetary development has all but eliminated much of Earth's surface history?
a. flooding b. cratering c. differentiation d. bombardment e. slow surface evolution
The above picture shows how temperature varies through the atmospheric layers of the Sun. The bottom thermometer is shown to be in the chromosphere
a. True
b. False
The advantage that a lever can give you is that
A. with a small lever, you can move a large weight. B. with a large force, you can torque a large weight. C. with a small force, you can move a large weight. D. with a small torque, you can lift a large weight.
A 6.0-mF capacitor is attached to a 20-V power supply. How much energy is stored in the capacitor?
a. 2.0 × 10^-3 J c. 2.0 × 10^-4 J b. 5.2 × 10^-4 J d. 1.2 × 10^-3 J