As a 70-kg person stands at the seashore gazing at the tides (which are caused by the Moon), how large is the gravitational force on that person due to the Moon?
The mass of the Moon is 7.35 × 1022 kg, the distance to the Moon is 3.82 × 108 m, and G = 6.67 × 10-11 N ? m2/kg2.
A) 0.0024 N B) 0.24 N C) 0.024 N D) 0.00024 N
A
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A series RLC circuit has a 100-? resistor, 4.00-mH inductor and a 0.100-?F capacitor connected across a 120-V rms ac source at the resonant frequency. What is the power dissipated by the circuit?
A) 100 W B) 120 W C) 144 W D) 160 W E) 45.8 W
If the radius of the Earth somehow decreased with no change in mass, your weight would
A) decrease. B) increase. C) not change.
Polarization: A beam of light is polarized in a vertical plane and has an intensity I0. The beam passes through an ideal polarizer and then through an ideal analyzer whose axis is set horizontally. If the axis of the polarizer is set at 60° with the vertical, what is the ratio of the intensity of the final beam to I0?
A. 0.19 B. 0.25 C. 0.31 D. 0.37 E. 0.43
As you move farther away from a source emitting a pure tone, the __________ of the sound you hear decreases
Fill in the blank(s) with correct word