Calculate wavelength

Question

Calculate the wavelength of:

a.)	an electron (9.10×10-31 kg) moving at a speed of 5.81×106 m/s (13000000 miles per hour).
b.)	a baseball (0.140 kg) moving at a speed of 40.2 m/s (90 miles per hour).

Answer 1

De Broglie wavelength

λ = h / mv

λ = wavelength = ?

h = Planks constant = 6.626x10^-34 kg m2/s

m = mass in kg = 9.10x10^-31 kg

v = velocity in m/s = 5.81x10⁶ m/s

λ = 6.626x10^-34 / (9.10x10^-31)(5.81x10⁶)

λ = 1.25x10^-10 m

Solve the baseball problem the same way using the values for m and v provided.