Wednesday

August 27, 2014

August 27, 2014

Posted by **HANNE** on Sunday, October 28, 2012 at 5:34am.

1)Find the mass of one nucleus of the unknown element. Express your answer in terms of the proton mass m

2)What is the speed of the unknown nucleus immediately after such a collision?

ANSWER I GOT:

•physics-mechanics-collisions,momentum, impulse - bobpursley, Saturday, October 27, 2012 at 6:26am

Momentum:

p is mass of a proton

M is the mass of the nuclei

p*2.4E7=Mv' + p(-2.1E7)

KEnergy:

1/2 p (2.4E7)^2=1/2 M v'^2 + 1/2 p (-2.1E7)^2

Two equations, two unknowns: Let algebra go to work. Solve for v' in the first equation in terms of M

then, put that expression for v' into the second equation. It will work out.

MY CALCULATIONS:

so : v' = 7.52679E-20/M?

and, M= 5.66525677E-39

V' = 7.52679E-20/5.66525677E-39 =

1.328587618E19

is this correct???

please help me. i don't reallly understand this question...

- physics-mechanics-collisions,momentum, impulse -
**bobpursley**, Sunday, October 28, 2012 at 11:44amV' is correct.

I am certain M is wrong, it is smaller than either an electron or proton, which cannot be. Recheck your work on that.

**Related Questions**

physics-mechanics-collisions,momentum, impulse - You are at the controls of a ...

physics-mechanics-collisions,momentum, impulse - You are at the controls of a ...

Physics HELP! - You are at the controls of a particle accelerator, sending a ...

physics - A beam of protons is moving toward a target in a particle accelerator...

physics- MC QUESTION! - Question: A particle is initially traveling to the right...

mc questions - Question # 1-What is the magnitude of the momentum of a particle...

Please help with Physics Quickly - 1. How are impulse and momentum related? (...

physics - when an impulse is given to a particle, momentum is transferred from ...

Physics help? - Nitrogen gas molecules, which have mass 4.65×10−26 kg, are...

Physics - Each of the protons in a particle beam has a kinetic energy of 3.05 10...