If you mix a typical iodine ion (I, atomic no. = 53) with a typical barium ion (Ba, atomic no. = 56), what compound is formed?
A) BaI2
B) BaI
C) Ba56I53
D) Ba2I
E) Ba2I2
Answer: A
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If y = 0.02 sin (30x ? 400t) (SI units) and if the mass density of the string on which the wave propagates is 0.005 kg/m, then the transmitted power is
a. 1.03 W. b. 2.13 W. c. 4.84 W. d. 5.54 W. e. 106 W.
Three long wires parallel to the x axis carry currents as shown. If I = 20 A, what is the magnitude of the magnetic field at the origin?
a.
37 ?T
b.
28 ?T
c.
19 ?T
d.
47 ?T
e.
58 ?T
Instructions: On occasion, the notation 
= [A, ?] will be a shorthand notation for 
.
Anthony has added the vectors listed below and gotten the result 
. What errors has he made?
?
?
?
A.
.B.
in 
as 
.C.
.D.
E.
To transmit power over great distances, why is HIGH VOLTAGE chosen for long distance power lines?
What will be an ideal response?