Thursday
December 12, 2013

# Posts by Noel

Total # Posts: 56

physics
Quartz has a refractive index of 1.54. If light from a HeNe laser impinges on an air/quartz interface at an angle of 22.5 degrees, what is the angle of refraction?

physics
Calculate the frequency in hertz, wavelength in nm, and the velocity in m/s of light inside a material with a refractive index of 1.39. In vacuum, the light has a wavelength of 514.5nm

chemistry
the work done by the system during a certain adiabatic process is 200J. What is the change in U of the system

chemistry
if PV=RT + ἁP where ἁ is a constant Calculate the work if the gas is heated at constant pressure from T1 to T2 Calculate the work if the gas is expanded isothermally and reversibly

Chemistry
what would be the effect on a chromatographic peak of introducing the sample at too slow a rate

chemistry
how would the graph of Pressure vs Volume look for a sample of an ideal gas that has a volume of 1 L at 0 degrees Celsius and 1 bar. How would the graph of Pressure versus volume look for sample of gas at the same conditions but at 100 degrees Celsius?

statistics
what is the 4σ rule of thumb in statistics

chemistry
calculate the rms speeds of He at 10, 100, and 1000 K in meters per second and in miles per hour. What values would be otained if the pressure was 10^-10 bar

chemistry
But the problem didnt give temperature that is qhat confused me

chemistry
calculate the pressure (in Pascals and bar) of 10^23 gas particles each with a mass of 10^-25 kg, in a 1 L container if the rms speed is 100m/s? What is the total kinetic energy of these particles? What is the temperature inside the container

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