Three discrete spectral lines occur at angles of 10.0°, 13.6°, and 15.0°, respectively, in the first-order spectrum of a diffraction grating spectrometer.
(a) if the grating has 3750 slits/cm, what are the wavelengths of the light?
λ1 = nm (10.0°)
λ2 = nm (13.6°)
λ3 = nm (15.0°)
(b) at what angles are these lines found in the second-order spectra?
θ = ° (λ1)
θ = ° (λ2)
θ = ° (λ3)

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.6 m below the tank bottom which is a = 6.7 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute). report your answer in meters to two decimal places.