Top answers

What is the difference between & and && operators?

& operator is a bitwise AND, whereas && operator is a logical AND.
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Answered by Artur K. • Python tutor
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Why are bit patterns often displayed in hexadecimal notation instead of binary notation?

Hexadecimal notation is compact, compared to binary notation, hence easier to understand by humans.
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Answered by Artur K. • Computing tutor
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Solve 2x+5=9

So, to solve this we want to isolate the x's on one side of the equation. We do this by subtracting 5 from both sides to give 2x=4. Then, we want to obtain a single x on one side of the equation. To do this,...
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Answered by Mike H. • Maths tutor
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A curve C has the equation x^3 + 6xy + y^2 = 0. Find dy/dx in terms of x and y.

By differentiating with respect to x, 3x^2+6x(dy/dx)+6y+2y(dy/dx)=0 So, dy/dx(6x+2y)=-3x^2-6y so dy/dx = -(3x^2+6y)/(2(3x+y))
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Answered by Mike H. • Maths tutor
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Describe the mechanism for bromination across a double bond

This mechanism is an example of an electrophillic addition reaction. Firstly consider the approach of a Br2, and how that bond will develop an induced dipole as a result of the high electron density on the d...
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Answered by Lewis O. • Chemistry tutor
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