Suppose we want a satellite to revolve around the earth 5 times a day. What should be the radius of its orbit? (The mass of the earth is 5.97 × 1024 kg, G = 6.67 × 10-11 N ? m2/kg2, and you can neglect the presence of the moon.)
A) 1.44 × 107 m
B) 0.690 × 107 m
C) 7.22 × 107 m
D) 2.11 × 107 m
Answer: A
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As you are leaving a building, the door opens outward. If the hinges on the door are on your right, what is the direction of the angular velocity of the door as you open it?
A) up B) down C) to your left D) to your right E) forwards
A 0.200-m wire is moved parallel to a 0.500-T magnetic field at a speed of 1.50 m/s. What emf is induced across the ends of the wire?
a. 2.25 V b. 1.00 V c. 0.600 V d. zero
The most effective wavelengths to see through the clouds of Venus to the surface are ________
Fill in the blank(s) with correct word
How much current must flow through a long straight wire for the magnetic field strength to be 1.0 mT at 1.0 cm from a wire? (?0 = 4? × 10-7 T ? m/
A) A) 50 mA B) 9.2 A C) 16 A D) 50 A E) 5.0 mA