Author Question: At what frequency will a 14.0-mH coil have 14.0 of inductive reactance? A) 1000 Hz B) 505 Hz ... (Read 52 times)

jman1234 · **on:** Jul 29, 2018

At what frequency will a 14.0-mH coil have 14.0 of inductive reactance?

A) 1000 Hz
B) 505 Hz
C) 257 Hz
D) 159 Hz

Question 2

A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a spaceship which travels away from Earth at a speed of 0.60c for five years (as measured by Courtney),

then immediately turns around and comes back at 0.60c. When Andrea returns, Courtney is 20 years old. How old is Andrea upon her return?
A) 20 y B) 12 y C) 10 y D) 15 y E) 18 y