A 10.0-kg picture is held in place by two wires, one hanging at 50.0° to the left of the vertical and the other at 45.0° to the right of the vertical. What is the tension in the second wire?
A) 71.8 N
B) 75.4 N
C) 98.1 N
D) 69.4 N
E) 23.8 N
B
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A 1.0 ?F capacitor has a potential difference of 6.0 V applied across its plates. If the potential difference across its plates is increased to 8.0 V, how much ADDITIONAL energy does the capacitor store?
A) 14 ?J B) 28 ?J C) 2.0 ?J D) 4.0 ?J
The SI units of velocity are
a. mi/h b. km/h c. m/s2 d. m/s e. none of the above
If a point charge of -30 µC experiences an electrostatic upward force of 27 mN at a certain location in the laboratory, what are the magnitude and direction of the electric field at that location?
What will be an ideal response?
If a specially designed space probe reaches the event horizon of a black hole, an observer watching the clock on this probe from a safe distance would see
A) the clock slow down. B) the clock speed up. C) the clock keep time in sync with the observer's clock. D) the time on the clock would appear to change randomly.