physics

[astarmathsandphysics]

Will have a look when i get home

[ruby92]

Thank You 

[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]

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

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.

[halosh92]

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.

thankyou 

[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?

this is from paper 2 CIE physics
i would really appreciate is someone would draw this graphs and post them here   

M/j 2004 2 b
 I need this ASAP   

[AN10]

plz explain mcq 27 of the paper attached.

[Nobody]

plz explain mcq 27 of the paper attached.

answer is c

[AN10]

ya i know but y C

[astarmathsandphysics]

D electric field strength is force per unit charge \
E=F/q

[nid404]

but the answer is FqQ 

I skipped this one...now im confused

[cashem'up]

BUT THE answer is D not C.........lolzzz.........F/q

[nid404]

u sure?

then it's ok 

[cashem'up]

u sure?

then it's ok 

 yep m 100% sure checked the ms and ER......no doubt abt..lolzz........by the way nid404 which subs have u taken for as levels