One of the most serious 3-D defects that affects the strength of ceramics is the presence of _____________.
Fill in the blank(s) with the appropriate word(s).
voids
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Two uncharged metal spheres, L and M, are in contact. A negatively charged rod is brought close to L, but not touching it, as shown. The two spheres are slightly separated and the rod is then withdrawn. As a result:
A. both spheres are neutral B. both spheres are positive C. both spheres are negative D. L is negative and M is positive E. L is positive and M is negative
An RL series circuit has the following components: 5.0-mH coil, 4.8-W resistor, 12-V battery, ammeter, and switch. After the switch is closed for a long time, find the final value of the current
a. 12 A c. 2.5 A b. 2400 A d. 58 A
Constant Angular Acceleration: A machinist turns on the power on to a grinding wheel at time t = 0 s. The wheel accelerates uniformly from rest for 10 s and reaches the operating angular speed of 58 rad/s. The wheel is run at that angular velocity for 30 s, and then power is shut off. The wheel slows down uniformly at 1.4 rad/s2 until the wheel stops. What is the total number of revolutions made by the wheel in this situation?
A. 510 B. 280 C. 320 D. 470 E. 750
How long will it take a charged 80-?F capacitor to lose 20% of its initial energy when it is allowed to discharge through a 45-? resistor?
A. 0.92 ms B. 0.64 ms C. 0.40 ms D. 0.19 ms E. 0.80 ms