Top answers

A ladder 6·8m long is leaning against a wall, as shown in the diagram. The foot of the ladder is 1·5m from the wall. Calculate the distance the ladder reaches up the wall. Give your answer to a sensible degree of accuracy.

There's a lot of information here so we should start out by drawing up a diagram. From this we can see that we have a right-angled triangle, and we know two of the angles and want to work out a third. Theref...
RS
Answered by Rohan S. • Maths tutor
5222 Views

A curve has equation: y = x^3 - 3x^2 + 5. Show that the curve has a minimum point when x = 2.

A minimum point will have a gradient of 0 (although so will a maximum point or a point of inflection). dy/dx = 3x 2 -6x. We can substitute x = 2 into this equation to give 0 (alternatively solve 3x 2 -6x = 0...
TC
9860 Views

Define what degenerate genetic coding means and why it is advantageous

Degenerate genetic coding means that although there are 64 different codons, there are only 21 amino acids, meaning that there are multiple codons which code for one single amino acid. The advantage for this...
AS
Answered by Avinash S. • Biology tutor
56838 Views

Write the number 0.0534 in standard form (1 mark)

5.34 x 10 -2
CT
Answered by Christopher T. • Maths tutor
3889 Views

Describe the generator effect and its use within transformers (6 marks)

The generator effect is the induction of a potential difference (leading to a current) when a wire experiences a change in magnetic field) (2 marks)In a transformer, there are primary and secondary coils. An...
TM
Answered by Tobias M. • Physics tutor
17046 Views