Light waves are traveling through glass. if the wavelength of some part of the light wave is 4 x 10^(-7) m and the frequency of that light is 5 x 10^(14) hz, what is the speed of light through the glass? 8 x 10^(-22) m/s 1.25 x 10^21 m/s 1 x 10^7 m/s 2 x 10^8 m/s

Agalvanometer has an internal resistance of 100 ω and deflects full-scale at 2.00 ma. what size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 ma, and how should this resistor be connected to the galvanometer?

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.