Amy, Brad, and Cate are walking (or running) along a straight line as shown below
8
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Which galaxy, as observed, has aged the most since it was born?
A) a very distant galaxy B) a nearby galaxy C) The distance of a galaxy doesn't matter.
How much charge must pass by a point in a wire in 10 s for the current through the wire to be 0.50 A?
A) 20 C B) 2.0 C C) 5.0 C D) 0.050 C
If the net work done on a certain object is zero, make a statement concerning its speed?
What will be an ideal response?
Three charged particles are arranged on corners of a square as shown in Figure OQ23.11, with charge -Q on both the particle at the upper left corner and the particle at the lower right corner and with charge +2Q on the particle at the lower left corner. Suppose the +2Q charge at the lower left corner is removed. Then the magnitude of the field at the upper right corner:
1.becomes larger.
2.becomes smaller.
3.stays the same.
4.changes unpredictably.