Assuming the length remains the same, calculate the period of the same simple pendulum on the surface of the Moon? [Note: The acceleration (g) due to gravity on the Moon is one-sixth of that on Earth.]
The period would be greater, because the value of g on the moon is less. Eq. 3.1
shows that if g = 163 cm s2 , the period on the moon would be 6.22 s.
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A brass bar (E 5 110 MPa) of length L 5 2.5 m has diameter d1 5 18 mm over one-half of its length and diameter d2 5 12 mm over the other half. Compare this nonprismatic bar to a prismatic bar of the same volume of material with constant diameter d and length L. The elon-gation of the prismatic bar under the same load P 5 25 kN is approxi-mately:
(A) 3 mm
(B) 4 mm
(C) 5 mm
(D) 6 mm
The phase angle of an LRC series circuit with a capacitive reactance of 40 ?, a resistor of 100 ? and a certain inductor at 1000 Hz is 40.0°. What is the value of the inductance in this circuit?
A) 11.8 mH B) 124 mH C) 212 mH D) 61.9 mH E) 19.7 mH
"Half-integral spin" means spin
a. 1/2 b. 1/2, 1, 3/2, 2, ... c. 1/2, 3/2, 5/2, ... d. none of the above
Two point charges of values +3.4 mC and +6.6 mC are separated by 0.20 m. What is the electrical potential at the point midway between the two charges? (ke = 8.99 × 10^9 N×m2/C2)
a. +1.8 × 10^6 V c. +0.90 × 10^6 V b. -0.90 × 10^6 V d. +3.6 × 10^6 V