What would be the resonant frequency of an LRC circuit with R = 15 , L = 25 mH, and C = 30 F?
A)
1150 Hz
B)
180 Hz
C)
60 Hz
D)
120 Hz
E)
53 MHz
Question 2
Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 4r.
Moon A takes 20 days to complete one orbit. How long does it take moon B to complete an orbit?
A)
20 days
B)
40 days
C)
80 days
D)
160 days
E)
320 days