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Describe the initiation and conduction of electrical signals through the heart.

For the heart to pump efficiently the control of contraction of its atrium and ventricles needs to be coordinated. Electrical signal starts at the sinoatrial (SA) node, also known as the pacemaker node. The ...
HA
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Solve 5x-13 > 3x-7 for x.

What we're aiming to do is to have the 5x and 3x on the same side, and the constants on the other side of the inequality. So first let's subtract 3x from both sides, which gives 5x-3x-13>-7. Now to 'move'...
NM
Answered by Nigel M. • Maths tutor
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How would I derive Kepler's third law from Newton's law of gravitation and the equations of circular motion?

Kepler's third law states that the square of the period of the orbit is directly proportional to the cube of the radius of the orbit (T^2=kr^3) where r is some constant to be determined. This can be determin...
MW
Answered by Matthew W. • Physics tutor
10384 Views

How would I find the approximate area enclosed by the expression e^x*sin(x)*x^3 on an infinite scale?

The area under a curve is analytically calculated using the integral of the function. The integral of the function above could be calculated using integration by parts twice, considering that 3 functions are...
MW
Answered by Matthew W. • Maths tutor
3562 Views

Talk about the relation between differentiability and continuity on a real function and its derivative.

In a real 2-Dimensional function f(x) on the X-Y plane, we have the following relations between these concepts: i) f'(x) is continuous if and only f(x) is differentiable; in fact, the continuity of f'(x) ens...
MM
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