A violin string which is 30.4 cm long is tuned so that its pitch is concert A which is 440 Hz. (In the case of a violin, "pitch" means the fundamental frequency of the standing wave on the string.) ( can effectively shorten the string by placing my finger on it and pressing it down. How far from the end of the string should I put my finger if I want the pitch of the note to be 573 Hz

Zirconium has an hcp crystal structure and a density of 6.51 g/cm3. (a) what is the volume of its unit cell in m3? (b) if the c/a ratio is 1.593, compute the values of c and a.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?