Question

Let’s assume that the speed of a typical racing car can be recorded to an accuracy of 0.001 kph.
Assuming the track distance is known to an accuracy of 0.01 km, is the uncertainty principle
violated for a 1-tonne car? Why or why not?

Answer 1

No, it's not. Strictly speaking, in terms of position and momentum, the uncertainty principle says:\[\Delta x \Delta p \ge \frac{ ħ }{ 2 }\]
Given that substitute your values:
\[\Delta x = 0.01km = 10m\]\[\Delta p = 1 tonne*0.001kph = 1000kg *0.00028m/s = 0.28kg∙m/s\]\[\Delta x \Delta p = 10m*0.28kg∙m/s = 2.8kg∙m ^{2}/s\]\[\frac{ ℏ }{ 2 } = 1.055*10^{-34}kg∙m ^{2}/s\]So, you end up with an uncertainty 2*10^34 times greater than the Uncertainty Principle requires. All is well with Heisenberg. This case points out that generally violations of the Uncertainty Principle are not a concern in the macro world.

Answer 2

thanks, it's really helpful

Answer 3

health

Answer 4

To solve the system of equations Zack

Answer 5

Eduardou2019s average speed on his commute to work was 55 miles per hour. On the way home, he hit traffic and only averaged 40 miles per hour.

Answer 6

health

Answer 7

biology

Answer 8

An ophthalmo-orhinolaryngololist is _____.

Answer 9

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Answer 10

Blowfly pupae are recognized by _____.

the inactive, hard-shelled cases that loo

Answer 11

history

Answer 12

Listen to the audio and then answer the following question. Feel free to listen to the audio as many times as necessary before answering the question.

Answer 13

A drifter in the night

Answer 14

A drifter in the night

Answer 15

A temperature of _____ would cause the blowfly eggs to mature most rapidly.

40 d

Answer 16

Angle D is a circumscribed angle of circle O.

Answer 17

The absence of blowflies at a death scene indicates _____.

the death took place

Answer 18

The succession of insects coming to the dead body is _____.

unpredictable
predic

Answer 19

The succession of insects coming to the dead body is _____.

unpredictable
predic

Answer 20

Listen to what Charlie will do on his day off depending on the weather and answer the following question.

Answer 21

The first stage of the blowfly larval development takes place _____ of the dead body.

Answer 22

Charlotte has set up a home maintenance service that operates out of her city.