One of the unusual features of the Earth's moon is that it is
A) very large
B) very small
C) made mostly of rock
D) keeps one side facing the Earth
A
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Three-dimensional viewing normally involves
A) parallax. B) two-eye vision. C) an ability to see 'around' things. D) all of the above E) none of the above
Four identical point charges (+6.0 nC) are placed at the corners of a rectangle which measures 6.0 m × 8.0 m. If the electric potential is taken to be zero at infinity, what is the potential at the geometric center of this rectangle?
A. 58 V B. 63 V C. 43 V D. 84 V E. 11 V
A toroidal solenoid has a central radius of 0.50 m and a cross-sectional diameter of 10 cm. When a current passes through the coil of the solenoid, the magnetic field inside the solenoid at its CENTER has a magnitude of 2.0 ?T
What is the largest value of the magnetic field inside the solenoid when this current is flowing? (?0 = 4? × 10-7 T ? m/A) A) 2.2 µT B) 0.50 µT C) 1.8 µT D) 3.5 µT E) 2.8 µT
A 50-kg satellite circles planet Cruton every 5.6 h in an orbit with a radius of 12 × 10^6 m. What is the magnitude of the gravitational force on the satellite by planet Cruton?
a. 63 N b. 58 N c. 68 N d. 73 N e. 50 N