economics

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Sally and a partner holds the ends of a spring 4 meters apart. There are 5 nodes in the standing wave produced. Sally moves her hand from the rest position back and forth along the floor 20 times in 4 seconds.
Determine the following:
Wavelenght of wave sally sue sent
Frequence of wave produced
Speed of wave

  • economics -

    If one wants to know how the material well-being of the average person has changed over time in a given country, one should look at the?
    A. level of real GDP.
    B. growth rate of nominal GDP.
    C. growth rate of real GDP.
    D growth rate of real GDP per person?

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