## HW Problem 1.39 (6th Edition)

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Heidi Ibarra Castillo 1D
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

### HW Problem 1.39 (6th Edition)

Does anyone know how to solve this problem?

arif_latif_2G
Posts: 60
Joined: Fri Sep 28, 2018 12:23 am

### Re: HW Problem 1.39 (6th Edition)

You have to use de Broglie equation: wavelength = h/p [p = momentum = mass(kg) * velocity (m/s)]. So convert 5.15oz into kg: 5.15 * 28.9 * 10^-3 = 0.148835kg. Then mutliply the weight that is in kg by velocity( which needs to be converted into m/s from mi/h [92mi/h * 1609.34/3600 -> .4470388889mi/s]) to get the momentum. Then divide planck's constant by the momentum to get the wavelength.

404817859
Posts: 27
Joined: Tue Nov 14, 2017 3:02 am

### Re: HW Problem 1.39 (6th Edition)

your answer should be around 1.1x10^-34 m

Raquel Rodriguez
Posts: 68
Joined: Fri Sep 28, 2018 12:26 am

### Re: HW Problem 1.39 (6th Edition)

arif_latif_3A wrote:You have to use de Broglie equation: wavelength = h/p [p = momentum = mass(kg) * velocity (m/s)]. So convert 5.15oz into kg: 5.15 * 28.9 * 10^-3 = 0.148835kg. Then mutliply the weight that is in kg by velocity( which needs to be converted into m/s from mi/h [92mi/h * 1609.34/3600 -> .4470388889mi/s]) to get the momentum. Then divide planck's constant by the momentum to get the wavelength.

Where did you get 28.9 from?

Vanadium Wang 4H
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

### Re: HW Problem 1.39 (6th Edition)

I believe 28.9 is a typo, the correct number should be 28.3. In one ounce there are 28.3495 grams.

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