Physics Geniuses of Newschoolers...

[Edward.]

An α-particle has a charge of +2e and a mass of 6.64

× 10-27 kg. It is accelerated from

rest through a potential difference that has a value of 1.51

× 106 V and then enters a uniform

magnetic field whose magnitude is 3.87. The α-particle moves perpendicular to the magnetic field at

all times. What is (a) the speed of the α-particle

I have the problem all set up to what final velocity is after using conservation of energy but all I need now is to figure out what delta V is. Do I just assume that delta V is just 1.51

× 106 V since the particle starts at rest?

 

[broto]

i'm in 11th grade physics wat is this

 

[Rafiki]

4

 

[Brawndo_swag]

if all goes accordion to plan then the planets will align and kthulu will reek havoc upon the world

 

[DrZoidberg]

Haven't done one of these in a while. Are they giving you the potential in volts? Which would make sense I guess. Can't you get velocity by using 1/2 Mv^2 since you know m, and could know energy if you know the total energy change. Or use f=ma and replace f with the coulomb force equation or whatever it's called. I might be saying random stuff, hopefully it points you the right way. Like I said, I havent done one of these in a while.

 

[Schlutz]

69

 

[youngdtay]

Ow! This hurts because it's true for me as well.

 

[Edward.]

Haha, thanks for the effort and honest answer though. I guess I underestimated the amount of people in college physics on newschoolers right now

 

[zerospinskier]

It says the potential accelerating it is 1.51 MV. Use that.

 

[DrZoidberg]

I took calculus based physics that involved this like a year ago, this was useful because it's related to how mass spectrometers work. I bet mass spec is in a lot of example problems. But I'd have to read my notes or do a few problems to remember, cause right now I'm derping hard.