Question

1. The batteries in a digital alarm clock provide a terminal voltage of 9 V. What is the potential difference across the entire clock current?
A. 4.5 V
B. 18.0 V
C. 9.0 V
D. 6.0 V
**C is my answer

2. Why does the earth have a magnetic declination?
a. the earth's axis of rotation is not constant
b. the magnetic field of the earth is unknown
c. its magnetic poles shift over time and are not aligned to its geographical poles.
d. the north and south poles are improperly named.
**A is my answer

3. If your image is 10.0 m from you in a flat mirror, how far are you standing from the mirror?
A. 10.0 m
B. 20.0 m
C. 1.0 m
D. 5.0 m
**D is my answer

Am I correct? Thank you!!:)