In order to construct a voltmeter from a galvanometer, one normally would
A)
use a very small shunt resistor.
B)
use a very large shunt resistor.
C)
use a very small series resistor.
D)
use a very large series resistor.
D
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which of the following is true about Copernicus's Model of the cosmos
a) Retrograde motion is an apparent motion which occurs when Earths passes or laps a planet such as Mars as they both orbit the Sun b) the outer planets orbit the Earth in perfect circles c)Earth is at the center of the cosmos
Starting outside the region with the magnetic field, a single square coil of wire enters, moves across, and then leaves the region with a uniform magnetic field
perpendicular to the page so that the graph shown below represents the induced emf. The loop moves at constant velocity 
. As seen from above, a counterclockwise emf is regarded as positive. In which direction did the loop move over the plane of the page?
?
?
a.
The loop moved from bottom to top.
b.
The loop moved from top to bottom.
c.
The loop moved from left to right.
d.
The loop moved from right to left.
e.
All of these directions of motion will produce the graph of emf vs t.
A 30-cm-OD pipe with a surface temperature of 90°C carries steam over a distance of 100 m. The pipe is buried with its center line at a depth of 1 m, the ground surface is –6°C, and the mean thermal conductivity of the soil is 0.7 W/(m K). Calculate the heat loss per day, and the cost of this loss if steam heat is worth $3.00 per 106 kJ. Also, estimate the thickness of 85% magnesia insulation necessary to achieve the same insulation as provided by the soil with a total heat transfer coefficient of 23 W/(m2 K) on the outside of the pipe.
GIVEN
FIND
(a) The heat loss per 24 hour day
(b) The value of the lost heat
(c) The thickness of 85% magnesia insulation necessary to achieve the same insulation
ASSUMPTIONS
Steady state conditions
Uniform thermal conductivity
Two dimensional heat transfer from the pipe
SKETCH
Intensity: The intensity of the waves from a point source at a distance d from the source is I. What is the intensity at a distance 2d from the source?
A. 4I
B. 2I
C. I/2
D. I/4
E. I/