A Ferris wheel starts from rest and builds up to a final angular speed of 1.9 rad/s while rotating through an angular displacement of 4.9 rad. What is its average angular acceleration?
a. 9.3 rad/s2
b. 0.37 rad/s2
c. 2.6 rad/s2
d. 0.39 rad/s2
b
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A proton moving at a speed of 3.8 × 10^6 m/s cuts across the lines of a magnetic field at an angle of 40°. The strength of the field is 0.25 × 10^-4 T. What is the magnitude of the force acting on the proton? (qp = 1.6 × 10^-19 C)
a. 1.4 × 10^-17 N c. 9.8 × 10^-18 N b. 2.3 × 10^-17 N d. 5.1 × 10^-18 N
In a grandfather clock, the pendulum measures the time elapsed. A grandfather clock is gaining time. Should you shorten or lengthen the pendulum?
What will be an ideal response?
Determine the shape factor F1–4 for the geometrical configuration shown below.
GIVEN
Geometrical configurations shown above
FIND
The shape factor F1–4
About how many times larger in diameter is a 
nucleus than an 
nucleus?
A. 2.37 B. 1.54 C. 1.33 D. They are about the same size. E. Some other factor (specify)