A long straight wire carries a current of 40 A in a region where a uniform external magnetic field has a 30-?T magnitude and is parallel to the current. What is the magnitude of the resultant magnetic field at a point that is 20 cm from the wire?
a. 70 ?T
b. 40 ?T
c. 10 ?T
d. 50 ?T
e. 36 ?T
d
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Volcanism is apparent on many objects in the solar system. However, volcanic activity is known to be currently occurring only on Earth and Jupiter's satellite____________________
Fill in the blank(s) with correct word
A parallel plate capacitor is connected to a battery that maintains a constant potential difference between the plates. If the spacing between the plates is doubled, how is the magnitude of charge on the plates affected?
At what rate is thermal energy generated in the 20-? resistor when ? = 20 V?
a.
6.5 W
b.
1.6 W
c.
15 W
d.
26 W
e.
5.7 W
In 1989, Neptune was found to have a huge storm named the:
A) South Tropical Disturbance. B) Great Red Spot. C) Great Dark Spot. D) Hellas Basin. E) Galileo Regio.