What is the current through the 8.0-? resistor?
a.
1.0 A
b.
0.50 A
c.
1.5 A
d.
2.0 A
c
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A design requires a material that must have a high melting temperature, high stiffness, high compressive strength, low density, and low cost. Which of the following materials is most likely to best satisfy the design requirements?
(a) Alumina ceramic (b) Carbon steel (c) Polyethylene (d) Graphite-reinforced-epoxy composite
The existence of the neutrino was postulated to account for which basic conservation laws during the beta decay process?
a. conservation of energy b. conservation of momentum c. Both choices a and b are valid. d. None of the above choices are valid.
A 2.5-mC charge is on the y-axis at y = 3.0 m and a 6.3-mC charge is on the x-axis at x = 3.0 m. What is the direction of the potential at the origin?
A. 22.0
B. 168
C. 292
D. 332
E. potential has no direction
Coulomb's Law: As shown in the figure, the charge Q is midway between two other charges. If Q = -7.5 nC, what must be the charge q1 so that charge q2 remains stationary as Q and q1 are held in place?
A. 30 nC B. 15 nC C. 7.5 nC D. 60 nC