Physics questions!

[Lasercookie]

There is beta decay where an electron is emitted, which is what is common.
Then there is beta-positive decay where a positron is emitted, this is pretty rare.

Beta particle:

Beta-positive particle

So in decay, a proton changes into a neutron, so atomic number will decrease by 1.
in decay, a neutron changes into a proton, atomic number will increase by 1.
In both cases mass number is conserved.

EDIT: Fixed my wording and stuff.

[schnappy]

Beta isn't the atomic symbol of a beta particle. Nor is the atomic number of a beta particle -1. If I was a teacher and I saw written somewhere I'd shit bricks.

[iNerd]

Beta isn't the atomic symbol of a beta particle. Nor is the atomic number of a beta particle -1. If I was a teacher and I saw written somewhere I'd shit bricks.

That is dedication. Shitting bricks is hard work.

[schnappy]

After posting the above I checked out some physics text to see if I could see that notation anywhere, and now I'm quite adamant that I'm still correct. But I found this that may interest you, as per your prior inquiry.

Edit: Actually beta is the symbol for a beta particle of course, but what I meant is that it's really just describing an electron which does not have an atomic number.

[Thu Thu Train]

beta decay is either or

[Lasercookie]

I've probably made a mistake with the thingy as pointed out, going by what others say: seems to be incorrect; I can't find it anywhere else on the internet either. My definitions are probably incorrectly worded as well.

However, referring back to my physics book from last year (Heinemann), that notation is used in that book.

I've attached the bit from the Heinemann book that uses that kind of notation.

Edit: Also in the Heinemann book (on the same page), it says:

The atomic number of −1 indicates that it has a single negative charge, and the mass number of zero indicates
that its mass is far less than that of a proton or a neutron.

[Hutchoo]

Medical physics time

Question is attached below, your help would be awesome.

Thanks.

[Hutchoo]

Another one

[Whatlol]

v= (2d/t)
d= 1/2(vt)
d= 375m

b. v= lambda x frequency
   lambda = 1500/(1x10^6) = 1.5x10^-3m

[Hutchoo]

v= (2d/t)
d= 1/2(vt)
d= 375m

b. v= lambda x frequency
   lambda = 1500/(1x10^6) = 1.5x10^-3m

Thanks for the help. Needed it a week ago though, LOL. Already had my SAC/test on it.

[Whatlol]

v= (2d/t)
d= 1/2(vt)
d= 375m

b. v= lambda x frequency
   lambda = 1500/(1x10^6) = 1.5x10^-3m

Thanks for the help. Needed it a week ago though, LOL. Already had my SAC/test on it.

ahhh sorry )= i havent been on often . Hope the sac went well (=

[Hutchoo]

v= (2d/t)
d= 1/2(vt)
d= 375m

b. v= lambda x frequency
   lambda = 1500/(1x10^6) = 1.5x10^-3m

Thanks for the help. Needed it a week ago though, LOL. Already had my SAC/test on it.

ahhh sorry )= i havent been on often . Hope the sac went well (=

Yeah, it went very well managed to get full marks 0_o. Very straight forward stuff.