A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

2 answers

The DeBroglie wavelength is

lambda=plancks constant/momentum

covert 24miles/hr to m/s first.
They throw in 24m/h to confuse you. The speed is 100m/9.3s.

Use the formula:
wavelength= Planck’s Constant/(mass x velocity)

Wavelength = 6.63 x 10^-34/ 84.5(100/9.3)

Answer= 7.29 x 10^-37