Author Question: A 10 microcoulomb charge is placed at the origin and a 20 microcoulomb charge is placed on the ... (Read 30 times)

Shelles · **on:** Jul 29, 2018

A 10 microcoulomb charge is placed at the origin and a 20 microcoulomb charge is placed on the x-axis at x = 40 cm. If an electron is placed on the y-axis at y = 30 cm, what is the magnitude of the force it will experience?

A)

0.615 10-12 N
B)

2.46 10-13 N
C)

4.92 10-13 N
D)

1.23 10-13 N
E)

2.46 10-14 N

Question 2

Two in-phase loudspeakers are some distance apart. They emit sound with a frequency of 1536 Hz. You move between the speakers,

along the line joining the them, at a constant speed of 2.8 m/s. What beat frequency do you observe? The speed of sound in the room is 330 m/s.
A)

13 Hz

B)

431 Hz

C)

26 Hz

D)

4.7 Hz

E)

118 Hz