## Post-Module Assessment #35 [ENDORSED]

$\lambda=\frac{h}{p}$

Lucian1F
Posts: 87
Joined: Fri Sep 29, 2017 7:07 am
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### Post-Module Assessment #35

Calculate the wavelength of a 275 kg single-seat electric car traveling at a speed of 125 km.hr-1. Do electric cars have wavelike properties?

A. λ = 6.94 x 10-38 m , Yes

B. λ = 6.94 x 10-38 m , No

C. λ = 1.93 x 10-38 m , Yes

D. λ = 1.93 x 10-38 m , No

The correct answer is B. The wavelength is so small it cannot be measured, but doesn't this mean electric cars still have wavelike properties? I thought that all matter has wavelike properties. Is this just poorly worded or am I mistaken?

sahajgill
Posts: 20
Joined: Fri Sep 29, 2017 7:06 am

### Re: Post-Module Assessment #35

it doesn't have wavelike properties because it is too small to detect. the threshold is anything x 10^-15 as the smallest wavelength that portrays wavelike properties

Christy Lee 2H
Posts: 73
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### Re: Post-Module Assessment #35  [ENDORSED]

I think that only very very small objects have wavelike particles, and when they get too big, the wavelike properties are basically negligible, which is why they say electric cars would not have wavelike properties.