If the distance between two asteroids is doubled, the gravitational force they exert on each other will
A) be 1/16 as great.
B) be one-half as great.
C) also be doubled.
D) be four times greater.
E) be one-fourth as great.
E
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A series LRC circuit consists of a 12.0-mH inductor, a 15.0-µF capacitor, a resistor, and a 110-V (rms) ac voltage source. If the impedance of this circuit is 45.0 ? at resonance, what is its impedance at a frequency twice the resonance frequency?
What will be an ideal response?
Spiral arms are obvious—easily-seen features—because they contain ____
a. dense molecular clouds b. atomic hydrogen clouds c. sun-like stars d. OB associations e. supernovae
A third apparent visual magnitude star is brighter than a fifth apparent visual magnitude star
a. True b. False Indicate whether the statement is true or false
Projectile Motion: A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown, assuming negligible air resistance?
A. 6.1 m/s B. 7.4 m/s C. 8.1 m/s D. 8.9 m/s