A scientist observes light from a star with a wavelength 2 of 97 nanometers (9.7 x 10% mì What is the photon energy. E of this light Use this information to help you
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speed of light in a vacuum, c=3.00 x 10 meters/second
• Planck's constant, h=4.136 x 10-15 ev s

The size (radius) of an oxygen molecule is about 2.0 ×10−10m. make a rough estimate of the pressure at which the finite volume of the molecules should cause noticeable deviations from ideal-gas behavior at ordinary temperatures (t= 300k ). assume that deviatons would be noticeable when volume of the gas per molecule equals the volume of the molecule itself.