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How do you work out the tangent to a circle at a given point on the circle?

(Suppose the coordinates of the point on the circle is (2, 3))To calculate the tangents equation we will first work out it's gradient. The tangent to a circle at a point is perpendicular to the radius of the...
JH
Answered by James H. • Maths tutor
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What's the difference between a local and a global variable?

A global variable can be accessed from anywhere within the program whereas a local one can only be accessed from within the method it's declared in.
JH
Answered by James H. • Python tutor
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An individual is seated in a darkened room. What would you expect their pupils to look like? A light is shone onto their eyes and a change in their pupils is noted, what change would you expect and why?

In dark/dim conditions the human pupil dilates (diameter increases) to allow more light in.In bright conditions the pupil constricts (diameter decreases) and less light enters the eye.This is through a combi...
TB
Answered by Tom B. • Biology tutor
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Whats is the difference between a function and a procedure?

A procedure is a named set of instructions that can be called on by throughout the program.A function is a procedure that returns a value.Both functions and procedures can take parameters.
JH
Answered by James H. • Python tutor
8670 Views

Calculate the frequency of genotypes in a population in Hardy Weinberg equilibrium with the allele frequencies of A=0.6 and a=0.4. Thus calculate the number of individuals with each genotype in a population of 150

A= 0.6 a= 0.4 p+q=1 where p=A and q=a p 2 +2pq+q 2 =1where AA=P 2 Thus AA frequency in the population = 0.6 2 = 0.36Aa=2pq Aa frequency in the population = 2(0.4 X 0.6) = 0.48aa=q 2 aa frequency in the popul...
HB
Answered by Harvey B. • Biology tutor
7045 Views