you are standing on a concrete slab that in turn is resting on a frozen lake. assume there is no friction between the slab and the ice. the slab has a weight five times your weight.

This statement is true.

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