Recent content by mattg443

when D is in the circle, ABC=ADC I have come up with a proof which says otherwise to robphy for when B and D are on different circles, UNLESS is it is missing a link (which is likely) I added a centre to each of the circles and found that angle ADC is only equal to angle ABC is AO1CO2...

Yes, but is angle ADC equal to the angle subtended by the same chord in the other circle (angle ABC)

I was wondering if the common chord of two intersecting circles subtends an equal angle in both circles at the circumference (in no special cases i.e different radii circles etc) If not, are there any special case(s) where this would work, making these two triangles similar or ABDC is a...

Okay, haven't come across that yet. But thanks. Another related question - in the reducing sugars test, using beddedicts solution, the reaction involves OH- ions, yet Bennidicts solution is CuSO4. Do the OH- ions come from the self ionisation of water? Thanks (im only in high school, so sorry if...

But isn't the only difference between glucose and galatose the positioning of the OH/H groups off the carbons? Which is a rotation isn't it? Galactose: http://img.tfd.com/mgh/ceb/thumb/Structural-formula-for-x3b1-d-galactose.jpg Glucose :http://drpinna.com/wp-content/uploads/2010/08/glucose.gif

Hi. When glucose is dissolved into water it forms d-glucose where it is equilibrium with its alpha and beta glucose isomers since the end carbon can rotate. (yes?) Just wondering if it was possible that some of the middle carbons rotated and then some galactose was produced (since it...

Why is it that an electron traveling under the influence of a magnetic field (i.e electron going from left to right and B field going into the page) will travel in the arc of a circle yet when an electric field alone is applied (say up page and the direction of motion of the electron is the...

(maybe another explanation/example will help)

Ok, so the red and blue lines are wave fronts, but i still can't see how those two lines represent the same wave. I see that it makes sense that they are the same wave, i just can't visualise how they could be the same wave, if drawn in two different spots.

The definition of an integral is adding (\sum) very skinny things (lim\delta x-->0) between two points. If you are finding the area under a curve, you integrate between two points and are adding skinny rectangles (with almost no width i.e\deltax), which are practically adding lines. (you just...

I am aware that when an X ray is 'reflected' from the sheets of a crystal lattice, some radiation passes through whilst remaining radiation penetrates different layers or is scattered. And that if the path difference of the wave traveled is an integral value of wavelengths, constructive...

As you rotate a cross section of the curve around the axis, it forms a cylinder, with radius y=f(x). and a thickness of δx. The volume of that cylinder is given by: A=\piy2 δx As the thickness of the cylinder approaches zero and you add (integrate) all the volumes of the reaaaaaly thin...