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What is an action potential, and what steps are involved?

Action potentials are changes of electrical potential in a cell. The normal resting membrane potential inside cells is around -70mV. This membrane potential is maintained through the action of the Na + K + A...
CL
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How do I solve the following simultaneous equations? y = 2x -3 and 2x + 3y = 23

Equation 1 : y = 2x -3 Equation 2: 2x +3y = 23To solve these equations you use a method called substitution The information from the 1st equation is used by the 2nd one Sub in the formula for y like so: 2x +...
AK
Answered by Anika K. • Maths tutor
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Compare the advantages and disadvantages of light and electron microscopes.

Electron microscopes have higher magnification and higher resolution than light microscopes. Scanning electron microscopes can be used to examine the surface of cells and structuresLight microscopes can be u...
TD
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To what extent do Aristotelean tragic properties influence Shakespeare's Othello?

The classic Aristotelean tragic properties, as set out in his Poetics, are tools by which Shakespearean tragedy was shaped. For instance, they are heavily influential and prevalent in Othello, as this eponym...
TH
4965 Views

Solve x^2 + 7x + 10 = 0

First factorise the quadratic into the form (x + a)(x + b) = 0.This will make x^2 + ax + bx + ab = 0.Work out a and b so that a + b = 7 and a b = 10.a = 5 b = 25+2 = 7 5 2 = 10.
SK
Answered by Simone K. • Maths tutor
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