Author Topic: Physics help!  (Read 12012 times)

Offline M-H

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Re: Physics help!
« Reply #90 on: September 12, 2010, 09:39:35 pm »
Phew! :)

nid404

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Re: Physics help!
« Reply #91 on: September 14, 2010, 04:42:14 pm »
Not yet :P

Can someone explain this BS =.=

Thank you


Offline Deadly_king

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Re: Physics help!
« Reply #92 on: September 15, 2010, 05:47:24 am »
Not yet :P

Can someone explain this BS =.=

Thank you



Answers for Vout will be as follows : 1     2     4     5      6      7

I'll explain now..........in the first row
VA = 0, VB = 0 and VC = 1. Hence resulting Vout was given to be 1V.
In other words he meant that when VC = 1 ------> Vout = 20 = 1

For the 2nd row
Only VA = 1. the others were zero and the value for Vout was given to be 4V.
Therefore when VA = 1 ------> Vout= 22 = 4V

Everything is in powers of two.

When any voltage is given to be zero.........it is indeed zero.

When VA = 1 --------> 22V
When VB = 1 --------> 21V
When VC = 1 --------> 20V

For Vout, you just have to add the values of VA,VB and VC

The fifth row : Vout = 22 + 21 + 0 = 6V
The sixth row : Vout = 22 + 21 + 20 = 7V

Hope it helps  :)
« Last Edit: September 15, 2010, 08:34:57 am by Deadly_king »

nid404

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Re: Physics help!
« Reply #93 on: September 19, 2010, 08:33:39 am »
Thank youuuuuuuu + rep

Offline sizbeauty

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gravitaional ques!!
« Reply #94 on: September 19, 2010, 04:58:15 pm »
a space capsule is travelling b/w the earth n moon.find the distance frm the earth at which it is subjct to zero gravitational force??
 (mass of the earth: 6.0*10^24,mass of moon: 7.4*10^22,this b/w the centres of earth n moon:3.8*10^8)
plz help me out in this ques!!

nid404

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Re: gravitaional ques!!
« Reply #95 on: September 19, 2010, 05:15:22 pm »
a space capsule is travelling b/w the earth n moon.find the distance frm the earth at which it is subjct to zero gravitational force??
 (mass of the earth: 6.0*10^24,mass of moon: 7.4*10^22,this b/w the centres of earth n moon:3.8*10^8)
plz help me out in this ques!!

The gravitation pull of the earth should match the gravitational pull of moon.

F=Gm1m2/ r2

GX 6.0*10^24m2/r2= G X  7.4*10^22m2/ (3.8*10^8-r)2

Solve for r




elemis

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Re: Physics help!
« Reply #96 on: September 19, 2010, 05:18:18 pm »
I would so love to understand all of that one day.  :-\

nid404

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Re: Physics help!
« Reply #97 on: September 19, 2010, 05:19:13 pm »
I would so love to understand all of that one day.  :-\

Me too  ::)

elemis

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Re: Physics help!
« Reply #98 on: September 19, 2010, 05:23:30 pm »
Me too  ::)

JOKE OF THE MILLENNIUM !!! :D

EPIC !!! :D

nid404

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Re: Physics help!
« Reply #99 on: September 19, 2010, 05:27:56 pm »
JOKE OF THE MILLENNIUM !!! :D

EPIC !!! :D

Yeah laugh ::)

elemis

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Re: Physics help!
« Reply #100 on: September 19, 2010, 05:34:58 pm »

nid404

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Re: Physics help!
« Reply #101 on: September 19, 2010, 05:35:34 pm »

elemis

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Re: Physics help!
« Reply #102 on: September 19, 2010, 05:39:43 pm »

Offline sizbeauty

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Re: Physics help!
« Reply #103 on: September 19, 2010, 06:11:05 pm »
hey i m getting R=3.4*10^9 but in pstpprz ans is R=3.4*10^8...cn u plz c where am i going wrong??
n scndly,i gt tht u cancelld out value of G on both sidez but wht abt m2?? why did u cancel it out??
bdw thanx alot!! :) :)

nid404

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Re: Physics help!
« Reply #104 on: September 19, 2010, 06:14:50 pm »
m2 is the same on either sides so they get cancelled too.

The answer can't be 10^9 because the distance between the earth and moon itself is to the power 10^8. Check the numbers again.