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
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
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
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.