the gravitational attraction between two masses varies inversely as the square of the distance between them. if the force of attraction is 4 lb when the masses are 3 ft apart, what is the attraction when the masses are 6 ft apart?

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.

May strike workers if the load swings, twists, or turns.

Answers basic questions for me