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Physics ppr 1 Discussion Here only!

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girl_92:

--- Quote from: unknown on June 11, 2009, 08:18:36 am ---
--- Quote from: el.diablo on June 11, 2009, 08:15:54 am ---
--- Quote from: bibo the wa7sh on June 11, 2009, 08:12:31 am ---waT iS the answer for the energy thingy....hyrolectric...nuclear?? :o
nD the one for the waves from deep to shaLLow wHat haPPenS?? :-X ???
number 39 ....do we substract 4 or 2 from 138??


--- End quote ---
I wrote hydroelectric;
For waves.... I think I chose C because the speed changes and so does the direction;
138>2+136 ... um so the answer was 136.. I guess?

--- End quote ---
they asked d nutrons so y subtract only protons change nt nutrons

--- End quote ---
the nucleon number ius 4 which is the sum of protons n neutrons so to find the total no.of neutrons u have to subtract the mass number frm the atomic nuber (4-2) so only  two neutrons are lost which makes it 136

Diablo:

--- Quote from: Roxy on June 11, 2009, 08:20:00 am ---wasnt the 1st answer 60m/s ?

and the echo wasnt it ... PV.. the side tht the girl was standing on ..?

and the one about the fuse ... I wrote 10A ...is it correct ?

--- End quote ---
For the first answer I used the formula average speed=distance/time ... I think you just added the minimum and maximum speed and divided by 2.. which is most likely wrong. They just asked the average to confuse us.

I'm not sure about your answer with the fuse.. I mean most of us here chose 1A.

The echo....... um it was ZY.. because the sound will hit  that wall since it's closer and then the sound waves are reflected towards the girl.

XaM!!:

--- Quote from: el.diablo on June 11, 2009, 08:18:06 am ---
--- Quote from: SnEaKrzzz NyTe...... on June 11, 2009, 08:16:21 am ---wat abt dat barometer one????? whch postition will t get? n secondly wat abt dat smoke ques???

--- End quote ---
Barometer, the height will be the same.. as for the smoke question it's because it's less dense than air.

--- End quote ---


Thanks....

girl_92:

--- Quote from: Roxy on June 11, 2009, 08:20:00 am ---wasnt the 1st answer 60m/s ?

and the echo wasnt it ... PV.. the side tht the girl was standing on ..?

and the one about the fuse ... I wrote 10A ...is it correct ?

--- End quote ---
which one was 60m/s
n the echo was ZY n the fuse cannot be 10A

XaM!!:
ya wat ws da ans of first one?? n 5555 or whoevr u r chem hasnt hapend yet. i thnk u vr tryin 2 say biology.... but phy ws tricky...

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