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physics

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astarmathsandphysics:
Will have a look when i get home

ruby92:
Thank You  :D

ruby92:
o/n 2008 paper 2 physics
a i in the ms the take s=12.8.
but it says the speed of the car before brakes are applied ??? ???
also isnt u=v (the speed with which the car is travelling) and v=0???

for the ii part why cant we use one of the formulas for acceleration?

halosh92:
i have a couple of questions:
for beta , alpha and gamma rays:

-which one deflects more in an electric field and why?
-and which one ionises more and why?
-and when we right the decay formulas, do we show the charge of the beta electron or alpha?
a-re all the 3 radiation coming from the nucleus?

thx

Nobody:

--- Quote from: halosh92 on May 03, 2010, 08:02:23 am ---i have a couple of questions:
for beta , alpha and gamma rays:

-which one deflects more in an electric field and why?
-and which one ionises more and why?
-and when we right the decay formulas, do we show the charge of the beta electron or alpha?
a-re all the 3 radiation coming from the nucleus?

thx

--- End quote ---


1) A beta particle is deflected more that an alpha particle in an electric field. This is because a beta particle ( a high energy, fast moving electrons) is much smaller and lighter than an alpha particle( a helium atom).

2) Alpha particles are strongly ionising but can be stopped by paper or skin.Because they have a strong positive charge (+2) and a mass of 4 (i.e. 4 times the mass of a proton)

and yes....all three radiations are originated from nucleus of the atom.

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