Mass of object (wave nature of matter)

[quicksilver123]

Homework Statement

An object has a wavelength of 8.4*10^-14 m
and a speed of 1.2*10^6 m/s.
Find the mass.

Homework Equations

p=h/λ

The Attempt at a Solution

p=h/λ
mv=h/λ
m=h/λv

m=(6.63*10^-34)/((1.2*10^5)(8.4*10^-14))
m=6.577380952*10^-26 kg

Is this correct? (other than significant digits)

 

[jedishrfu]

the arithmetic works out correctly but your m=(6.63*10^-34) / ( (1.2*10^5) * (8.4*10^-14) ) equation
needs some parens in the denominator.

You must adjust m for significant figures to be m=6.58 E -26 kg

Also your logic looks right too, but being out of physics for a long time I'd wait for someone to second my opinion.

 

[quicksilver123]

fixed. as i mentioned in the op i haven't yet adjusted for sig dig

 

[jedishrfu]

fixed. as i mentioned in the op i haven't yet adjusted for sig dig

okay didnt see it. tunnel vision sometimes.

 

[quicksilver123]

thats cool thanks for checking anyway