Parkinson's disease is a progressive nervous system disorder that can cause tremors in the hands and arms, rigid muscles and speech changes such as slurring, according to the Mayo Clinic. â
Electric power law: P = V x I   P = power in watts   Einstein's law: E â¦ = m x cÂ²   E = energy in joules, m = mass in kilograms, and c is the speed of light.
The formula for frequency is: f (frequency) = 1 / T (period). f = c / Î» = wave speed c (m/s) / wavelength Î» (m). The formula for time is: T (period) = 1 / f (frequency). The formula for wavelength is Î» (m) = c / f Î» = c / f = wave speed c (m/s) / frequency f (Hz). The unit hertz (Hz) was once called cps = cycles per second. Choose: Speed of sound in air at a temperature of 20Â°C: c = 343 m/s or speed of radio waves and light in a vacuum: c = 299,792,458 m/s.