A series of 3 uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the third shell is
A. ?3q.
B. ?(ln 3)q.
C. +q.
D. +(ln 3)q.
E. +3q.
Answer: C
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A long linear charge distribution of charge density 1.35 nC/m is surrounded by a concentric cylindrical surface of length 1.60 m and radius 23.6 cm. What is the electric flux through the surface of the cylinder?
A. 0.00
B. 160 
C. 244
D. 280
E. 316
Determine the wetted perimeter and the hydraulic diameter DH, for a circular tube filled with R-134a liquid as shown in the sketch.
What will be an ideal response?
Atomic nuclei repel each other with a force called the _____
A) Coulomb force B) gravitational force C) Newtonian force D) magnetic force
In an "atom smasher," two particles collide head on at relativistic speeds
If the velocity of the first particle is 0.741c to the left, and the velocity of the second particle is to the right (both of these speeds are measured in Earth's rest frame), how fast are the particles moving with respect to each other? A) 0.866c B) 1.091c C) 0.883c D) 0.788c