Recent content by Soojin

Homework Statement "A brass wire with Young's modulus of 9.1 1010 Pa is 2.1 m long and has a cross-sectional area of 4.6 mm2. If a weight of 5.0 kN is hung from the wire, by how much does it stretch?" The answer is to be given in cm. Homework Equations I used the equation for...

frequency = v / \lambda, so I would think the frequency would be left unchanged. So I'm thinking I could do: f = (speed of light in air)/0.527 to solve for the frequency, then use that value to solve for the wavelength of light in water?

Homework Statement "Light of wavelength 0.527 µm (in air) enters the water in a swimming pool. The speed of light in water is 0.700 times the speed in air. What is the wavelength of the light in water?" Homework Equations v = c /n, where n = 1.33 ,the index of refraction The...

Homework Statement For some reason I can't get my picture to show up, but here is the link to it: http://img.photobucket.com/albums/v302/Robi41035/Picture1.jpg "The plank is uniform and 2.2 m long. Initially the scales each read 100 N. A 1.60 m tall student then lies on top of the...

Homework Statement An aluminum cylinder weighs 1.03 N. When this same cylinder is completely submerged in alcohol, the volume of the displaced alcohol is 3.89 multiplied by 10-5 m3. If the cylinder is suspended from a scale while submerged in the alcohol, the scale reading is 0.732 N. What...