Johnny Jumper's favorite trick is to step out of his high-rise window and fall 37.0 m into a pool. A news reporter takes a picture of 67.0 kg Johny just before he makes a splash, using an exposure time of 8.00 ms.
(a) Find Johnny's de Broglie wavelength at this moment.
_____ m
(b) Find the uncertainty of his kinetic energy measurement during such a period of time.
_____ J
(c) Find the percent error caused by such an uncertainty.
______%