Given the atomic radius of helium, 0. 32 å, and knowing that a sphere has a volume of 4πr3/3, calculate the fraction of space that he atoms occupy in a sample of helium at stp.

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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.

He could be both if he is shy or confused