The radius of planet Relpek is identical to that of Earth, yet the mass is twice that of Earth’s. Your weight on Relpek, compared to your weight on Earth, is
A. quartered.
B. halved.
C. the same.
D. doubled.
E. quadrupled.
D. doubled, since the force (weight) is directly proportional to the mass.
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Different colors of light correspond to different light
A) velocities. B) intensities. C) polarities. D) frequencies. E) none of the above
The radioactive half-life of a material is the time for
A) half of an original quantity of the material to decay. B) its decay rate to reduce to half. C) both of these D) neither of these
A 25.0-g string is stretched with a tension of 43.0 N between two fixed points 12.0 m apart. What is the frequency of the second harmonic?
A) 6.00 Hz B) 12.0 Hz C) 18.0 Hz D) 24.0 Hz E) 36.0 Hz
The phase angle of an RLC series circuit with an inductive reactance of 200 ?, a resistor of 200 ? and a certain capacitor at 1000 Hz is 40.0°. What is the value of the capacitance in this circuit?
A) 1.95 ?F B) 2.95 ?F C) 3.95 ?F D) 4.95 ?F E) 5.95 ?F