Mass of object (wave nature of matter)

AI Thread Summary
The discussion revolves around calculating the mass of an object given its wavelength and speed. The formula used is m = h / (λv), where h is Planck's constant. The initial calculation yielded a mass of approximately 6.577 x 10^-26 kg, but it was noted that the denominator needed proper parentheses for clarity. The final mass, adjusted for significant figures, is confirmed to be 6.58 x 10^-26 kg. The participants agree on the correctness of the logic and calculations, with a reminder to consider significant digits.
quicksilver123
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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)
 
Last edited:
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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.
 
Last edited:
fixed. as i mentioned in the op i haven't yet adjusted for sig dig
 
quicksilver123 said:
fixed. as i mentioned in the op i haven't yet adjusted for sig dig

okay didnt see it. tunnel vision sometimes.
 
thats cool thanks for checking anyway
 
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