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Author Topic: Physics ppr 1 Discussion Here only!  (Read 19992 times)

Offline girl_92

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Re: Physics ppr 1 Discussion Here only!
« Reply #30 on: June 11, 2009, 08:23:32 am »
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??

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?
they asked d nutrons so y subtract only protons change nt nutrons
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
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Offline Diablo

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Re: Physics ppr 1 Discussion Here only!
« Reply #31 on: June 11, 2009, 08:24:11 am »
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 ?
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.
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Offline XaM!!

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Re: Physics ppr 1 Discussion Here only!
« Reply #32 on: June 11, 2009, 08:24:17 am »
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???
Barometer, the height will be the same.. as for the smoke question it's because it's less dense than air.


Thanks....
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Offline girl_92

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Re: Physics ppr 1 Discussion Here only!
« Reply #33 on: June 11, 2009, 08:24:45 am »
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 ?
which one was 60m/s
n the echo was ZY n the fuse cannot be 10A
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Offline XaM!!

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Re: Physics ppr 1 Discussion Here only!
« Reply #34 on: June 11, 2009, 08:25:48 am »
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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Offline Triple_A

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Re: Physics ppr 1 Discussion Here only!
« Reply #35 on: June 11, 2009, 08:26:36 am »
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 ?
its was 50km/h.....avg s=total dist./total time
i dont think so 10A....i chose 1A :D
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Offline Diablo

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Re: Physics ppr 1 Discussion Here only!
« Reply #36 on: June 11, 2009, 08:28:05 am »
Yes, indeed.
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Offline XaM!!

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Re: Physics ppr 1 Discussion Here only!
« Reply #37 on: June 11, 2009, 08:30:00 am »
ya it ws 50 studnts thought 2 take mean. but dat ws wrong.....
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Offline girl_92

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Re: Physics ppr 1 Discussion Here only!
« Reply #38 on: June 11, 2009, 08:33:58 am »
was tht metre rule tht last que on da first page was it 0.761m
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Offline Diablo

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Re: Physics ppr 1 Discussion Here only!
« Reply #39 on: June 11, 2009, 08:34:32 am »
Quote from: madee on June 11, 2009, 08:33:58 am
was tht metre rule tht last que on da first page was it 0.761m
Yes it was .
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Offline XaM!!

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Re: Physics ppr 1 Discussion Here only!
« Reply #40 on: June 11, 2009, 08:35:07 am »
but i chose D. wat ws D b.d.w?
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Offline girl_92

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Re: Physics ppr 1 Discussion Here only!
« Reply #41 on: June 11, 2009, 08:38:32 am »
Quote from: SnEaKrzzz NyTe...... on June 11, 2009, 08:35:07 am
but i chose D. wat ws D b.d.w?
d i think was 0.76142 im not sure
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Offline Diablo

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Re: Physics ppr 1 Discussion Here only!
« Reply #42 on: June 11, 2009, 08:39:35 am »
Hey guys, for the pressure exerted on the base of the containers..... I think I chose A... which was the liquid with higher density and small surface area. Any thoughts?
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Offline girl_92

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Re: Physics ppr 1 Discussion Here only!
« Reply #43 on: June 11, 2009, 08:41:46 am »
yea even i wrote A because water was more denser since the wolumes were equal for both water will definately have a greater mass n less surface area means more pressure
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Offline XaM!!

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Re: Physics ppr 1 Discussion Here only!
« Reply #44 on: June 11, 2009, 08:43:49 am »
i chose 0.716... D... cuz if u cnvrt it cums 0.7167.2
0.2 gvs nearest 2 mm
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