If the torsion constant of the suspension fiber in the Cavendish experiment were doubled, what would happen to the frequency of oscillation? The last two answers have been rounded to 2 significant figures
a. It would double.
c. It would increase by a factor of 1.4.
b. It would halve.
d. It would decrease by a factor of 0.71.
C
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A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 12° with the horizontal. The rope moves parallel to the slope with a constant speed of 1.0 m/s. The force of the rope does 900 J of work on the skier as the skier moves a distance of 8.0 m up the incline.
(a) If the rope moved with a constant speed of 2.0 m/s, how much work would the force of the rope do on the skier as the skier moved a distance of 8.0 m up the incline? At what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 1.0 m/s and (c) 2.0 m/s?
The number of vibrations per second of an electromagnetic wave is referred to as its
A) energy B) frequency C) speed D) wavelength
A mass is oscillating on a spring with a period of 4.60 s. At t = 0 s the mass has zero speed and is at x = 8.30 cm. What is its acceleration at t = 2.50 s?
A) 1.33 cm/s2 B) 0.784 cm/s2 C) 11.5 cm/s2 D) 14.9 cm/s2 E) 0 cm/s2
RC Circuits: When an initially uncharged capacitor is charged through a 25-k? resistor by a 75-V dc ideal power source, it takes 0.23 ms for the capacitor to reach 50% of its maximum charge? What is the capacitance of this capacitor?
Fill in the blank(s) with the appropriate word(s).