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Question1

Three identical 3.60 masses are hung by three identical springs. Each spring has a force constant of 4.90 and was 15.0 long before any masses were attached to it. How long is each spring when hanging as shown? First isolate only the bottom mass. Then treat the bottom two masses as a system. At last, treat all three masses as a system.

Question2

For your science fair project you have to to design a diffraction grating that will disperse the visible spectrum (400-700 nm) over 30 degrees in first order.

(a) How numerous lines per millimeter does your grating require?

(b) What is first order diffraction angle of light from a sodium lamp (wavelength= 589 nm)?

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