Science & Mathematics - 21 October 2007

A parallel plate capacitor in a vacuum has a capacitance of 6.4 nF. The capacitor is fully charged by connecting it across a 128V voltage source. The voltage is then removed without discharging the capacitor, and the space between the plates is filled withe a dielectric material. the capacitance is measure again and found to be 28.8 nF

So i found that voltage across the plates is 28.44V after inserting the dielectric. And that the charge on the plates will remain the same 8.192*10^-7 C.

Suppose the dielectric was inserted before removing the voltage source. Will the charge on the plates increase, decrease or remain the same? and what is the voltage across the plates now?

2007-10-21 08:41:17 · 2 answers · asked by I S 1 in Physics

or explosive

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thank you for answering

2007-10-21 08:34:19 · 11 answers · asked by CECILIA G 1 in Mathematics

factor

show me how 2 do dis prob. step by step..plz i wanna learn

1. 5x^3y^3-10x^2y^3+5xy^3


2. 27xyz^2 -12xy

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i know how to do this but i am going blank on this problem:
rewrite so the y is a function of x.

3x + 2y - 4 = 2(5-y)


-im just confused about the two ys(and if you could explain the steps that would be nice)
please and thankyous

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how many gallons of gasoline can be refined out of a barrel of crude oil

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pleassssssssss soonnnnnnnnnnnnnnnnnn

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I have an answer already, but I'm looking to verify it.

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3p, 2f, and 1p

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Im Working on a science project due on Wednesday

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Surely someone does...

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1) NH3
2) HF
3) CH4

1. 3 only
2. 1, 2,and 3
3. 1 and 3 only
4. 1 and 2 only

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thank you to those who answered

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Is this ionic, polar covalent, nonpolar covalent or metallic

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