x Turn on thread page Beta
 You are Here: Home >< Physics

# A2 Physics Questions watch

1. Can anyone please help me.It is from Edexcel A2 Physics book.

1.Lawrence’s second cyclotron, built with the assistance of Stanley Livingston was 25#cm in diameter and accelerated protons to 1#MeV.
a Calculate the speed of these protons.
b Calculate the momentum of these protons.
c Calculate the magnetic field strength Lawrence used in this cyclotron, assuming the protons move in a circle around the very edge of the machine.
d Calculate the frequency of the voltage that Lawrence and Stanley had to apply to achieve this proton acceleration.

2. The Large Hadron Collider is a giant circular accelerator near Geneva in Switzerland. The LHC website provides some facts about it:
• the circular ring has a circumference of 27#km
• each proton goes around over 11#000 times a second
• each proton has 7 <mult> 1012#eV of kinetic energy.
a Calculate the speed of these protons.
b Calculate ½ mv2 for these protons using mp = 1.67 <mult> 10?27#kg.
c How does your answer to b compare with the 7#TeV of kinetic energy the protons are given through pd acceleration?
d Explain this difference
2. If you want help here people will be more likely to reply if you
1. post one question per thread
2. show that you have tried the question yourself and specify exactly what it is you don't understand.

Do you have any formulas in your books or notes that you think might apply here?

People are not going to do the whole question or you.
3. (Original post by dforce)
Can anyone please help me.It is from Edexcel A2 Physics book.

1.Lawrence’s second cyclotron, built with the assistance of Stanley Livingston was 25#cm in diameter and accelerated protons to 1#MeV.
a Calculate the speed of these protons.
b Calculate the momentum of these protons.
c Calculate the magnetic field strength Lawrence used in this cyclotron, assuming the protons move in a circle around the very edge of the machine.
d Calculate the frequency of the voltage that Lawrence and Stanley had to apply to achieve this proton acceleration.

2. The Large Hadron Collider is a giant circular accelerator near Geneva in Switzerland. The LHC website provides some facts about it:
• the circular ring has a circumference of 27#km
• each proton goes around over 11#000 times a second
• each proton has 7 <mult> 1012#eV of kinetic energy.
a Calculate the speed of these protons.
b Calculate ½ mv2 for these protons using mp = 1.67 <mult> 10?27#kg.
c How does your answer to b compare with the 7#TeV of kinetic energy the protons are given through pd acceleration?
d Explain this difference
1a. Use the Kinetic energy formula and equate to the conversion of 1MeV*1.6*10^-19 and using the mass 9.11*10^-31
b)momentum=mass*velocity use your answer to part a
C) use the formula B=mv/rq
D)use the formula Bq/2Pim

you can do the rest, if right rep pls
4. Thank you
5. (Original post by ajayhp)
1a. Use the Kinetic energy formula and equate to the conversion of 1MeV*1.6*10^-19 and using the mass 9.11*10^-31
b)momentum=mass*velocity use your answer to part a
C) use the formula B=mv/rq
D)use the formula Bq/2Pim

you can do the rest, if right rep pls
using electron mass for proton? didn't get it

(i cannot get the suggested ans with the proton mass)
6. http://www.thestudentroom.co.uk/show....php?t=1597711
1.Lawrence’s second cyclotron, built with the assistance of Stanley Livingston was 25#cm in diameter and accelerated protons to 1#MeV.
a Calculate the speed of these protons.
b Calculate the momentum of these protons.
c Calculate the magnetic field strength Lawrence used in this cyclotron, assuming the protons move in a circle around the very edge of the machine.
d Calculate the frequency of the voltage that Lawrence and Stanley had to apply to achieve this proton acceleration.

I got the same ans. don't know what is wrong
have tried the relativistic KE as well

Turn on thread page Beta
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 3, 2013
Today on TSR

### Complete university guide 2019 rankings

Find out the top ten here

### Can I go to freshers even if I'm not at uni?

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE