A uniform sphere of radius r rotates about a diameter with an angular momentum of magnitude l. Under the action of internal forces the sphere collapses to a uniform sphere of radius r/2. The magnitude of its new angular momentum is:.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.