There are a variety of units for power. Which of the following would be fitting units of power (though perhaps not standard)?
A) Watt
B) Joule
C) Joule/second
D) HP
Ans: A) Watt
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An electroscope is charged positively as indicated by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves become
A) closer together. B) farther apart. C) motionless.
The pressure in a liquid depends on liquid
A) density. B) depth. C) both of these D) none of the above
Three resistors connected in parallel have the individual voltages labeled ?V1, ?V2 and ?V3, respectively. Which of the following expresses the total voltage ?VT across the three resistors when connected in this manner?
a. ?VT = ?V1 + ?V2 + ?V3 b. ?VT = (1/?V1 + 1/?V2 + 1/?V3) c. ?VT = ?V1 = ?V2 = ?V3 d. ?VT = (1/?V1 + 1/?V2 + 1/?V3)?1
A force on an object is given by F(x) = (2.00 N/m)x + (-3.00 N/m3)x3. What is a potential energy function for this conservative force?
A) 2.00 N/m - 9.00x2 B) (-2.00 N/m)x2 + (3.00 N/m3)x4 C) -2.00 N/m + (-3.00 N/m3)x2 D) (-1.00 N/m)x2 + (0.750 N/m3)x4 E) -2.00 N/m + 9.00x2