For a infinite, neutral wire in z direction, with steady current i. a charge, q, is placed a distance s below the wire with velocity v parallel to the wire.
a. calculate the lorentz-covariant force law.
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b. transform to new frame where particle is at rest. and compute the force on the particle in the boosted frame.

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)