How much energy is necessary to place three +2.0-µC point charges at the vertices of an equilateral triangle of side 2.0 cm if they started out extremely far away? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 )
A) 4.5 J
B) 5.4 J
C) 6.7 J
D) 7.6 J
B
Physics & Space Science
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The main application of PEEK is as a(n) _________material for carbon-fiber-reinforced composites in aircraft.
Fill in the blank(s) with the appropriate word(s).
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Explain the different causes of Type Ia, Type Ib, and Type II supernovae
What will be an ideal response?
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Why do you suppose water has been such a popular heat transfer material (steam heat, hot water systems, etc)?
What will be an ideal response?
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At what rate is thermal energy being generated in the 2R-resistor when ? = 12 V and R = 3.0 ??
a.
12 W
b.
24 W
c.
6.0 W
d.
3.0 W
e.
1.5 W
Physics & Space Science