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How would you preform the flame test to identify the presence of Sodium in a solution? (3Marks)

Using a clean nichrome wire dip the loop into the solution 2) Hold the loop in the blue flame of a bunsen burner 3) Observe the colour. In this case it will be Yellow.
TD
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y=(6x^9 +x^8)/(2x^4), work out the value of d^2y/dx^2 when x=0.5

The question can be represented by the notation d 2 y/dx 2 |x=0.5 , meaning the second derivative of y with respect to x resolved at x=0.5. Since y is in the form f(x)/g(x), the quotient rule could be used, ...
OC
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When "por" or "para" be used? Give some examples

Por:"Through"- Andamos por la cuidad. We walk through the cityDuration- Estudió por cuatro horas- I studied for four hours Exchange- Te doy diez euros por tu mochila. I'll give you ten euros for th...
ED
Answered by Emilia D. • Spanish tutor
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If f(x)=(x-2)^2, determine the gradient of the tangent to the curve f(x) at x=-2.

Firstly, we will need to determine f'(x) which is the derivative of the function and will give us the gradient at a point. This is easiest done but multiplying out the brackets of f(x) to get the function in...
CG
Answered by Cameron G. • Maths tutor
3966 Views

Using a diagram, show how a polluting factory may cause a negative externality to society, and how a tax might be used to solve this market failure.

The first thing to do in this question is to make sure to define the terms. A negative externality is the negative unintended spill-over effects of an economic activity. In this case, when the factory produc...
AM
Answered by Aurora M. • Economics tutor
3954 Views