If you double the net force on an object, you'll double its
A) acceleration.
B) speed.
C) velocity.
D) all the above
Answer: B
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Lenz's Law: According to Lenz's law, the induced current in a circuit always flows to oppose the external magnetic field through the circuit.
A. True B. False
A small bulb is rated at 7.5 W when operated at 125 V. Its resistance (in ohms) is
a. 0.45. b. 7.5. c. 17. d. 940. e. 2 100.
When throwing a ball straight up, which of the following is true about its velocity and acceleration at the highest point in its path?
A. both v = 0 and a = 0 B. v ? 0, a = 0 C. v = 0, a ? 0 D. v ? 0, a ? 0 E. not really sure
Jupiter completes one revolution about its own axis every 9.92 hours. What is the radius of the orbit required for a satellite to revolve about Jupiter with the same period? Jupiter has a mass of 1.90 × 1027 kg and G = 6.67 × 10-11 N ? m2/kg2
A) 1.04 × 107 m B) 2.26 × 109 m C) 1.60 × 108 m D) 3.41 × 108 m E) 7.45 × 108 m