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Three forces, act on a mass of 4.2 kg. The forces are X = 2.0 N acting to the east, Y = 5.0 N acting 45o to the north of east, and Z = 4.0 N acting 30o to the north of west. What is the magnitude of the net acceleration of the mass?
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Blue-green light has a frequency of about 6.00 x 10^14 Hz. Determine its wavelength. Compare this wavelength to the size of an atom (about 10^-10 m) by calculating the ratio: wavelength/(atom size).
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