The figure shows the orientation of a rectangular loop consisting of 80 closely wrapped turns each carrying a current I
The magnetic field in the region is 
mT. The loop can turn about the y axis. If ? = 30°, a = 0.40 m, b = 0.30 m, and I = 8.0 A, what is the magnitude of the torque exerted on the loop?
?
?
a.
2.5 N ? m
b.
1.5 N ? m
c.
3.1 N ? m
d.
2.7 N ? m
e.
0.34 N ? m
d
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What evidence do we have that volcanism occurs on Io?
What will be an ideal response?
An ideal gas is allowed to expand adiabatically until its volume increases by 50%. By approximately what factor is the pressure reduced? (? = 5/3.)
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