A series ac circuit has a resonance frequency of 9.0 kHz. If the inductor in the circuit has a value of 2.0 H, and the resistance is 75 ?, what is the capacitance of the circuit?
A) 0.16 pF
B) 156 pF
C) 6.2 pF
D) 17.7 pF
A
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An airplane is traveling in level flight at a constant velocity. L is the lift, W is the weight, T is the thrust, and D is the drag. Which of the diagrams is the correct free body force diagram for the airplane?
A. Figure 1
B. Figure 2
C. Figure 3
D. Figure 4
E. Figure 5
The period and frequency of a simple pendulum depend on the mass of the pendulum bob
Indicate whether the statement is true or false
Modern science attempts to seek explanations for phenomena that are based on
A) new subjective laws that are yet to be confirmed experimentally B) intuitive expectations C) the views of leading scientists D) the known laws of nature
The peak voltage of an AC source is 400 V. What is the rms voltage?
a. 100 V c. 141 V b. 200 V d. 283 V