Series/Parallel Circuits: Four resistors are connected across an ideal dc battery with voltage V, as shown in the figure. If the total current in this circuit is I = 1 A, what is the value of the voltage V?
A. 2 V
B. 4 V
C. 6 V
D. 8 V
E. 10 V
Answer: B
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A wave is represented by the equation y(x, t) = 3.2 cm sin(1000 rad/s t - 50
x). Another wave is represented by the equation y(x, t) = 4.2 cm sin(1000 rad/s t - 50
x). If the two waves interfere destructively, then what is equation that represents the coherent superposition of the two waves?
A. y(x, t) = 7.4 cm sin(1000 rad/s t + 50.0
x)
B. y(x, t) = 1.0 cm sin(1000 rad/s t - 50.0
x)
C. y(x, t) = 1.0 cm sin(1000 rad/s t + 50.0x)
D. y(x, t) = 7.4 cm sin(1000 rad/s t - 50.0x)
Most of the mass of the Milky Way seems to exist in the form of:
A) Population I stars in the disk. B) Population II stars in the Halo. C) hydrogen gas in the disk and spiral arms. D) dark matter out in the Halo. E) the black hole in the Galactic Center.
The SI unit of electric charge is e, the charge on the electron
a. True b. False Indicate whether the statement is true or false
The special theory of relativity predicts that there is an upper limit to the speed of an object
It therefore follows that there is also an upper limit on which of the following properties of the object? (There could be more than one correct choice) A) The kinetic energy of the object. B) The total energy of the object. C) The linear momentum of the object. D) None of the above.