For an LRC series circuit containing a resistance of 11.0-?, a capacitance of 2.0-?F, and an inductance of 24.0 H, what frequency is needed to minimize the impedance?
A) 0.023 kHz
B) 0.14 kHz
C) 10 kHz
D) 1.7 kHz
A
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A 10 kg solid cylinder (I = 1/2 
with a radius of 30.0 cm is rotating about a vertical axis through its center. If the angular momentum is increasing at the rate of 25.0 kg 
then what is the angular acceleration?
A. 75.3 
B. 65.9
C. 55.6
D. 40.5
E. 35.2
A tiny spring, with a spring constant of 1.30 N/m, will be stretched to what displacement by a 0.00500-N force?
a. 3.85 mm b. 7.69 mm c. 11.5 mm d. 6.50 mm e. 3.25 mm
When you hear the horn of a car that is approaching you, the frequency that you hear is larger than that heard by a person in the car because for the sound you hear
a. wave crests are farther apart by the distance the car travels in one period. b. wave crests are closer together by the distance the car travels in one period. c. the car gets ahead of each wave crest before it emits the next one. d. the speed of sound in air is increased by the speed of the car. e. a speeding car emits more wavecrests in each period.
If the work done to stretch an ideal spring by 4.0 cm is 6.0 J, what is the spring constant (force constant) of this spring?
A) 6000 N/m B) 7500 N/m C) 300 N/m D) 3000 N/m E) 3500 N/m