Question

SOS!! Please help! I'm exhausted and I don't even know where to begin.

Use the de Broglie's Wave Equation to find the wavelength of a 400 g ball moving at 120 m/s. Please show your work. Note: h = Planck's constant (6.62607 × 10-34 J*s)

Answer 1

1.3804313 * 10^(-35) m

Step-by-step explanation:

de Broglie's wavelength (λ) = h/p
= h/mv

Firstly, the momentum of the ball would be mass (0.4 kg) * velocity (120 m/s) = 48 g m/s

Now, h = 6.62607 * 10^(-34) Js

Plug in the values now:
λ = 6.62607 * 10^(-34)/48
= 1.3804313 * 10^(-35) m