What is the wavelength of a 147-g baseball traveling at 91.0 mph?

The formula to determine the wavelength is, De-Broglie wavelength formula:

     -(1)

where, is wavelength, m is mass, v is velocity and h is Planck's constant = =

mass, m = 147 g  (given)

Since, 1 g = 0.001 kg

So, 147 g = 0.147 kg

v = 91.0 mph    (given)

Converting mph to mps:

Since,

So, =

Substituting the values in formula 1:

Hence, the wavelength wavelength of a 147-g baseball traveling at 91.0 mph is

.