Q. Certain medical machine emits x-rays with a minimum wavelength of 0.029 nm. One day, the machine has an electrical problem and the voltage applied to the x-ray tube decreases to 75% of its normal value. Now what is the minimum x-ray wavelength produced by the machine?
Q. A simple harmonic oscillator consists of a block of mass 2.20 kg attached to a spring of spring constant 260 N/m. When t = 1.60 s, the position and velocity of the block are x = 0.128 m and v = 3.170 m/s. (a) What is the amplitude of the oscillations? What were the (b) position and (c) velocity of the block at t = 0 s?