A bowling ball has a mass of 7.0 kg, a moment of inertia of 2.8 × 10^-2 kg•m2, and a radius of 0.10 m. If it rolls down the lane without slipping at a linear speed of 5.0 m/s, what is its angular speed?
a. 0.80 rad/s
c. 0.050 rad/s
b. 50 rad/s
d. 40 rad/s
B
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A 12.0-V battery (potential source) is connected across a 6.00-µF air-filled capacitor. (a) How much energy can be stored this way? (b) How much excess charge is on each plate of the capacitor?
What will be an ideal response?
Consider two-dimensional steady conduction near a curved boundary. Determine the difference equation for an appropriate control volume near the node (i, j). The boundary experiences convective heat transfer through a coefficient h to ambient temperature Ta. The surface of the boundary is given by ys = f(x).
GIVEN
- Two-dimensional steady conduction near a curved surface
- Convective boundary condition
- Curved surface given by ys = f(x)
FIND
(a) Difference equation for a node i, j near the surface
SKETCH
A bullet of mass 0.010 kg and speed of 200 m/s is brought to rest in a wooden block after penetrating a distance of 0.10 m. This process takes 0.02 second. The magnitude of the impulse delivered to the bullet by the block during this time is
A. 0.98 N. B. 2.0 Ns. C. 1.0 Ns. D. zero. E. 4.0 Ns.
Which of the following copper alloys can be precipitation hardened to a relatively high yield strength?
(a) Beryllium copper (b) Cartridge brass (c) Copper nickel (d) Aluminum bronze