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March 28, 2015

March 28, 2015

Posted by **linds** on Saturday, April 21, 2012 at 12:43pm.

(a) Find the minimum uncertainty in the momentum of the object.

(b) Find the minimum uncertainty in the object's velocity, assuming that the object is a golf ball (mass = 0.045 kg).

(c) Find the minimum uncertainty in the object's velocity, assuming that the object is an electron.

- Physics please help! -
**Elena**, Saturday, April 21, 2012 at 3:08pmΔxΔp≥Һ/2

ΔxΔp=Һ/2

Δp = Һ/2 Δx = 6.6310^-34/21.1 = 310^-34 kgm/s,

Δp = mΔv

Δv = Δp/m = 310^-34/0.045 = 6.710^-33 m/s,

Δv = Δp/m = 310^-34/9.110^-31 = 3.310^-4 m/s.

- Physics please help! -
**linds**, Sunday, April 22, 2012 at 2:02pmUsing the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.

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