Ian

 
Member Since February 8, 2009
About Ian:

Retired chap. Enjoys helping others with maths and physics.


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Answered: By looking at just the equation (not the graph ...

You already know that linear (line) equations have x and y to power 1 y = 3x + 4 would be an example, but the next bit is about conic sections. LINKING GRAPHS TO SECOND DEGREE EQUATIONS ...

Answered: A Real hard Physics Problem

Answers only work once. Try to learn the methods. You probably know the formula Kinetic energy K = (1/2)mv^2 The answer is in Joules if the mass in kg and speed is in metres per second. This ...

Answered: What are quantum dots?

The previous posting has supplied an excellent answer. You can get further details by GOOGLING If you paste quantum dots into WIKIPEDIA you will get the option of several articles; the main one ...

Answered: Help I do not know where to start

Where to start ? Did you try any internet searches ? I am looking it up using Google. You couid do this yourself. Theorems for Segments and Circles here http://www.sparknotes.com/math ...

Answered: What's the differece between ac and dc current?

Alternating and Direct current Electricity flows in two ways, either in alternating current (AC) or in direct current (DC). The word electricity comes from the fact that current is nothing more ...

Answered: Difference between Atomic Energy & Nuclear Energy

The two are more or less interchangeable because a nucleus is in the middle of an atom. It is actually the nucleus splitting, (or less usually fusing), that creates the energy, so nuclear energy ...

Answered: Solutions real or imaginary

If the question was what solutions does the equation x^2 - 1 = 0 have? Then you know x^2 - 1 = (x - 1)(x + 1) = 0 so in that case you would have 2 real i.e. x = 1 and -1 But with ...

Answered: What is the value of z if 5(z-1)=5z?

Probably copied incorrectly because this would mean z - 1 = z What remains unchanged when you take 1 away ? Answer: Infinity Note: Infinity is not a number; it is an abstract concept. This is ...

Answered: How to make solarpad?

Try this http://www.ehow.com/how_4968623_make-solar-cell-home.html Regards - Ian

Answered: I am reading a book. The chapter title is

Basic introduction and links here http://nrich.maths.org/2490 Regards - Ian

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OronD says:
"Ian You are doing a great job in Yedda. I see many of your math answers and you are always clear and accurate. Best personal regards, OronD. "
MackTheKnife says:
"I really like your answers. They are very clear and well thought out. "