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An unknown capacitor is charged to 6v, its maximum value, then discharged through a 1k ohm resistor. If the capacitor voltage is 3v, 0.3 seconds after starting to discharge, what is the capacitance of the unknown capacitor?

To start, the equation to use can be identified as the capactior discharge equation V(t) = V max e -t/RC . From here, we can see that this equation can be solved to give capacitance, and identify which value...
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Answered by Alexander R. • Physics tutor
3942 Views

Calculate the pH change when water is added to 25.0 ml of 0.250M NaOH to form a 1.00l solution.

The initial [-OH] is 0.250M since NaOH releases 1 mole of -OH per mole of base. Using Kw=[H+][-OH], [H+]=(1 10 -14 )/0.250=4 10 -14 M (note remember units). Hence the initial pH=-log(4 10 -14 )=13.4 (note 3 ...
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Answered by Milind S. • Chemistry tutor
17526 Views

Describe the structure of a protein

All proteins are polymers of amino acids arranged with varying degrees of complexity. The most basic structure is the order of amino acids, this is called the primary structure. Amino acids form peptide bond...
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Answered by Sam C. • Biology tutor
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Asses the view that political factors best explain the American withdrawal from Vietnam.

The Vietnam War was a humiliating defeat for America. It was the first televised war which significantly changed how the U.S. public viewed international conflict and has remained an embarrassing debacle for...
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Answered by Phoebe G. • History tutor
6649 Views

How do I include context in a relevant way?

Context is an important part of the mark scheme and therefore is vital in your essay. However, you don't want to randomly include context, it is better to see how context arises from the text. Begin by analy...
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