For an electron moving in a direction opposite to the electric field
A) its potential energy increases and its electric potential decreases.
B) its potential energy decreases and its electric potential increases.
C) its potential energy increases and its electric potential increases.
D) its potential energy decreases and its electric potential decreases.
E) both its potential energy and it electric potential remain constant.
Question 2
In Fizeau's experiment to measure the speed of light, the wheel has 475 notches and rotates with a speed of 40.0 rev/sec. Light passing through one notch travels to the mirror and back just in time to pass through the next notch.
If the distance between the wheel and the mirror is 7890 m, what is the speed of light measured by this experiment? A) 3.00 108 m/s
B) 3.00 10-8 m/s
C) 3.22 108 m/s
D) 3.22 10-8 m/s
E) 2.25 108 m/s
Energy costs of locomotion.
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