two vectors, of magnitudes 20 and 50, are added. which one of the following is a possible answer for the magnitude of the resultant?

Ok, you asked the question and posted the answer on there. what do you need?

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.

The answer should be d if i’m wrong i’ll change my answer and fix it for you