The potential difference between the plates of a parallel plate capacitor with the plate separation of 6 cm is 60 V. What is the electric field between the plates of this capacitor?
A) 60 V/m
B) 500 V/m
C) 1000 V/m
D) 2000 V/m
E) 3600 V/m
C
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Which of the following is not produced by plate tectonics?
a. mid-ocean rifts b. rift valleys c. the ring of fire d. the Appalachian Mountains e. Earth's magnetic field
Spherical Mirrors: A cell phone that is 8.90 cm tall is placed in front of a convex mirror. The image of the phone is 7.80 cm tall and is located 14.8 cm from a mirror. What is the mirror's focal length?
A. -120 cm B. -105 cm C. +16.9 cm D. -13.0 cm E. +120 cm
A thermodynamic engine absorbs 64 kcal of energy each cycle and exhausts 42 kcal
(a) What is the efficiency of this engine? (b) How much work does this engine do per cycle?
From the fact that virtually every galaxy is moving away from us and more distant galaxies are moving away from us at a faster rate than closer ones, we conclude that
A) the Milky Way Galaxy is expanding. B) we are located at the center of the universe. C) the farthest galaxies will eventually be moving faster than the speed of light. D) the universe is expanding. E) the universe is shrinking.