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The point A lies on the curve with equation y=x^0.5. The tangent to this curve at A is parallel to the line 3y-2x=1 . Find an equation of this tangent at A. [5 marks]

Differentiate equation

dy/dx=0.5*x-0.5

Gradient is the same as the second equation

2/3=0..5*x-0.5 

Solving this ...

AM
Answered by Arnold M. Maths tutor
5934 Views

Describe the bonding and structure in solid sodium chloride

It is a giant lattice structure. Sodium ions (Na+) are positively charged and chloride ions (Cl-) are negatively charged. There is ionic bonding between - strong electrosatic forces of attraction between ...

AK
Answered by Arushan K. Chemistry tutor
6784 Views

When and where should I modulate in a Bach Chorale harmonisation?

A really good way to help yourself with every step of Bach Chorales is to write out a chart of all the notes that the home key, and any keys that you modulate to. This will help make sure you can easily s...

JW
Answered by Jenny W. Music tutor
7203 Views

Breifly describe the cohesion-tension theory in plants?

  1. Water evaporates from the cells and leaves the plant once the stomata open,

  2. This creates a suction which pulls more water into the leaf

  3. As water is cohesive d...

BQ
Answered by Brendan Q. Biology tutor
28994 Views

What is meant by the term salt? And how would you confirm if the salt had chloride ions in?

Part 1: "A salt is is when the Hion in an acid is replaced with a cation (e.g. a metal)" 

Part 2: You would use the silver nitrate test for halide ions. You add dilute nitri...

BQ
Answered by Brendan Q. Chemistry tutor
2627 Views

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