Isotopic analysis of meteorites suggests the Earth and the rest of the solar system formed
A) 3.85 billion years ago
B) 4.57 billion years ago
C) 4.38 billion years ago
D) 4.02 billion years ago
B
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The first planets ever discovered outside our Solar System were
A: Making their host stars wobble around detectably in the sky B: Transiting their host stars once every day C: Brightening background stars via microlensing D: In orbit around a millisecond pulsar, not a normal star E: Making their host stars wobble around such that the velocity could be detected by the Doppler Effect
When the magnitude of the charge on each plate of an air-filled capacitor is 4 ?C, the potential difference between the plates is 80 V. What is the capacitance of this capacitor?
A) 0.1 µF B) 50 µF C) 100 µF D) 20 µF E) 50 nF
Predicting an eclipse is easy because all you have to do is keep track of where the Moon crosses the ecliptic
a. True b. False Indicate whether the statement is true or false
The Young's modulus of aluminum is
If the density of aluminum is 
then what is the velocity of longitudinal waves along a thin aluminum rod?
A. 6,360 m/s B. 6,020 m/s C. 5,750 m/s D. 5,060 m/s E. 4,850 m/s