The device, consists of a beam suspended from one point and is used to find the mass of objects. a) An explanation of the principles of moments and how they apply in this situation.
b) An explanation of how it could be recalibrated to measure the value of greater masses.
( principle of moment)

c)as speed changes, wavelength and frequency change.

everything changes!

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.