A bicycle wheel of radius 0.36 m and mass 3.2 kg is set spinning at 4.00 rev/s. A very light bolt is attached to extend the axle in length, and a string is attached to the axle at a distance of 0.10 m from the wheel
Initially the axle of the spinning wheel is horizontal, and the wheel is suspended only from the string. We can ignore the mass of the axle and spokes. At what rate will the wheel process about the vertical?
A) 2.9 rpm
B) 1.9 rpm
C) 18 rpm
D) 0.30 rpm
E) 0.77 rpm
Answer: A
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An LC circuit consists of a 3.4-µF capacitor and a coil with a self-inductance 0.080 H and no appreciable resistance. At t = 0 the capacitor has a charge of 5.4 µC and the current in the inductor is zero
(a) How long after t = 0 will the current in the circuit be maximum? (b) What will be this maximum current? What will be an ideal response?
An automobile manufacturer claims that its product will, starting from rest, travel 0.40 km in 9.0 s. What is the magnitude of the constant acceleration required to do this?
A. 9.9 m/s2 B. 8.9 m/s2 C. 6.6 m/s2 D. 5.6 m/s2 E. 4.6 m/s2
The diagram shows a plot of the temperature of the sun as a function of distance above the bottom of the photosphere. What is the temperature of the sun at a distance of 2,000 km?
a. 500 K
b. 900 K
c. 5,000 K
d. 9,000 K
e. 100,000 K
The pressure at the bottom of aquarium A is greater than that at the bottom of aquarium B. Why might this be?
a. A is filled with fresh water, B has the same amount of salt water. b. A is filled to a greater depth than B. c. A has greater volume than B. d. The bottom of aquarium A has smaller area than that of B. e. none of the above