ALL PHYSICS DOUBTS - POST HERE !!

[haris94]

should be.....yea

cause temperature is constant while the state of matter is changing cause of latent heat

[Ivo]

Yup ur write for both thank u but 4 the 1st 1 wht did u do 2 get 150 i didnt get it maybee my nerves r getting 2 meee

3 * 25, because 1 lap is 3km, so 25 laps, is ......?  Answer's 150km in case you didn't get it

[8T]

Tuleen?

Hah, Yeah
Hi Wewe
Answer me if u can|?

[Ghost Of Highbury]

Yeah, that's what I'm thinking, cos melting is 31 degree bit.

Temperature constant when in the process of changing state. Solid to liquid has been done, liquid to gas takes place..

[Ivo]

should be.....yea

cause temperature is constant while the state of matter is changing cause of latent heat

During melting or boiling, the heat energy supplied is used to break bonds in liquid, therefore no temperature increase.  Apparantly latent heat of vaporisation is defined as: the energy supplied to change a liquid into a gas without a change in temperature.

[Raywin]

Hey guys... slip ring commutators split rings and brushes.. :S wht r they and wht r they present in? Thxs in advance..

[Weaam]

Hah, Yeah
Hi Wewe
Answer me if u can|?

Answer what? Your name is retarded. hahaha xD
Ma t5afee ma r7 27kee la7ada 

[haris94]

During melting or boiling, the heat energy supplied is used to break bonds in liquid, therefore no temperature increase.  Apparantly latent heat of vaporisation is defined as: the energy supplied to change a liquid into a gas without a change in temperature.

precisely 

[8T]

Answer what? Your name is retarded. hahaha xD
Ma t5afee ma r7 27kee la7ada 

Lol mish laha ldaraji
U already spelled my name .. wtvr
Anyway umm trace it bak may june 03 q 3 b P1V1=P2V2
Do we convert cm^3 to m^3 since Pa (N/m^2)??

[Shazizzzle]

Two things.
First of all, aren't beta particles electrons? Why, then are they emitted from the NUCLEUS, as states Q38 of M/J 2008, P1? :S
Secondly, O/N 2005, Q36, P1, I know you said that a neutron splits to form an electron and proton, but why can't we use the simple beta emission formula here. The _-1B particle, where A remains A, and Z + 1? :S Isn't that formula for unstable nuclei too? Because, a stable one doesn't emit anything.

[Ivo]

Two things.
First of all, aren't beta particles electrons? Why, then are they emitted from the NUCLEUS, as states Q38 of M/J 2008, P1? :S
Secondly, O/N 2005, Q36, P1, I know you said that a neutron splits to form an electron and proton, but why can't we use the simple beta emission formula here. The _-1B particle, where A remains A, and Z + 1? :S Isn't that formula for unstable nuclei too? Because, a stable one doesn't emit anything.

For your first question, it is simple.  If there are radioactive (unstable) nuclei, then it decays to becoming more stable.  However, during the process of decay, a beta particle is emitted from the nucleus.  And yes, beta particles are electrons.

[Weaam]

Lol mish laha ldaraji
U already spelled my name .. wtvr
Anyway umm trace it bak may june 03 q 3 b P1V1=P2V2
Do we convert cm^3 to m^3 since Pa (N/m^2)??

Oh yeaaah, sorry abt that

[Vin]

For your first question, it is simple.  If there are radioactive (unstable) nuclei, then it decays to becoming more stable.  However, during the process of decay, a beta particle is emitted from the nucleus.  And yes, beta particles are electrons.

what about positrons ?? they are beta decay too right ??

[Ghost Of Highbury]

Two things.
First of all, aren't beta particles electrons? Why, then are they emitted from the NUCLEUS, as states Q38 of M/J 2008, P1? :S
Secondly, O/N 2005, Q36, P1, I know you said that a neutron splits to form an electron and proton, but why can't we use the simple beta emission formula here. The _-1B particle, where A remains A, and Z + 1? :S Isn't that formula for unstable nuclei too? Because, a stable one doesn't emit anything.

In beta decay, the weak interaction converts a neutron (n) into a proton (p) while emitting an electron (e^-)

First) 38)m/j06. As the above states, the electron comes from the neutron, the neutron is in the nucleus.

Second) When a beta particle is emitted, The mass remains the same, because a neturon is replaced by a proton, the no. of neutrons decrease , no. of proton increases.

[Ivo]

Two things.
First of all, aren't beta particles electrons? Why, then are they emitted from the NUCLEUS, as states Q38 of M/J 2008, P1? :S
Secondly, O/N 2005, Q36, P1, I know you said that a neutron splits to form an electron and proton, but why can't we use the simple beta emission formula here. The _-1B particle, where A remains A, and Z + 1? :S Isn't that formula for unstable nuclei too? Because, a stable one doesn't emit anything.

 
145         0           145
      A  ->   beta +       Z
92          -1            93

Answer is D, oui ou non?