Help on this question please (1 Viewer)

[Trial&Error]

I kind of know how to answer it, but how do I EXPLAIN everything?

The momentum of an electron is measured to be 2.6 x10^-22 kgm/s
Explain why classical physics cannot adequately describe this momentum. Support your response with an appropriate calculation.
(3 marks)

I've found v = p/m = 0.95c
Now what do I do?

Thankss

 

[C2H6O]

not 100% sure but how id answer it is

show calculation for v
classical fails to account for effects of SR on momentum
define relativistic momentum (as v-->c, p-->infinity)
explain how if it were moving at .95c the measured momentum would be different, so it cannot be going .95c

 

[coolcat6778]

this question sucks and requires no critical thinking, really should be a 1 marker

 

[lunaaaa4403]

this question sucks and requires no critical thinking, really should be a 1 marker

name one thing ever you don't despise

 

[99.95dreams]

name one thing ever you don't despise

the only thing bro doesnt hate is maths ext 1. hates advanced, hates ext 2, but loves ext 1

 

[wizzkids]

I kind of know how to answer it, but how do I EXPLAIN everything?

The momentum of an electron is measured to be 2.6 x10^-22 kgm/s
Explain why classical physics cannot adequately describe this momentum. Support your response with an appropriate calculation.
(3 marks)

I've found v = p/m = 0.95c
Now what do I do?

Your first step is correct.
As a first approximation, you divide the measured momentum by the rest mass of the electron 9.1 x 10^-31 kg, and you find out that it must be travelling at a substantial fraction of the speed of light.
(This calculation should satisfy that part of the marking criteria, 1 mark)
Another 2 marks will be awarded for explaining why classical physics is inadequate.
The rest mass should be replaced by the relativistic mass of the electron (which is larger), using the relativistic mass equation which you can copy from the formula sheet.
Classical Physics can describe the momentum, but the calculated value of velocity will be inaccurate, it will come out too high.
The actual value of velocity is about 2.05 x 10⁸ m/s. You should try substituting this value for v back into the relativistic equation for momentum to confirm that you get the right value for

 

[coolcat6778]

the only thing bro doesnt hate is maths ext 1. hates advanced, hates ext 2, but loves ext 1

why would i hate advanced, an easy subject?

 

[alphxreturns]

why would i hate advanced, an easy subject?

didnt u say 2024 was not easy

 

[coolcat6778]

didnt u say 2024 was not easy

it was the questions were just suited for extension 1 brains instead. 2024 paper gave so much advantage to extension 1 students

 

[jane1820]

name one thing ever you don't despise

the only thing bro doesnt hate is maths ext 1. hates advanced, hates ext 2, but loves ext 1

didnt u say 2024 was not easy

im like 100% sure coolcat is just a ragebaiting acc atp