Pieces in the shape of spheres are to be made of lead castings. Each piece weighs 17.50 pounds. Find the required diameter of a casting. Lead weighs 707.7 pounds per cubic foot. Round the answer to the nearest hundredth inch.
A. 3.97
B. 4.13
C. 4.34
D. 4.55
Answer: C
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Answer the following statement true (T) or false (F)
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Answer the following statement true (T) or false (F)
A voltmeter is used to determine the voltage across a resistive element in the circuit of Figure P2.77. The instrument is modeled by an ideal voltmeter in parallel with a 120-k? resistor, as shown. The meter is placed to measure the voltage across R4. Assume R1 = 8 k?, R2 = 22 k?, R3 = 50 k?, RS = 125 k?, and iS = 120 mA. Find the voltage across R4 with and without the voltmeter in the circuit for the following values:
a. R4 = 100?
b. R4 = 1 k?
c. R4 = 10 k?
d. R4 = 100 k?
