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tiny-mole [99]
3 years ago
14

Adding more pulleys to a system of pulleys _____ needed to lift an object.

Physics
1 answer:
-Dominant- [34]3 years ago
3 0

I think it’s D-decreases the amount of work.

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In the Balmer series, how many spectral lines have the wavelength greater than 400 nm?
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E=hf C=wavelength*F

E=hC/wavelength

E=(6.626*10^-34)*(3.00*10^8)/670*10^-9

E=(6.626*10^-34)*(3.00*10^8)/450*10^-9

6 0
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