The speed of sound v in a medium depends on its wavelength 2, the young
moduluse, and the density p, of the medium. use the method of dimensional
analysis to derive a formula for the speed of sound in a medium. (unit for
young modulus e: kgm-15-2)

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

Plss anybody know how to do this? ? i need the answers from a through d

An object starts from rest at point f and speeds up continuously as it moves around an oval. a. choose a point about 1/8 th of the way around the oval from point f, and label it point g. draw a vector to represent the velocity of the object at point g. b. determine the change in velocity vector   between points f and g.