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Find a vector that is normal to lines L1 and L2 and passes through their common point of intersection where L1 is the line r = (3,1,1) + u(1,-2,-1) and L2 is the line r = (0,-2,3) + v(-5,1,4) where u and v are scalar values.

We will use the cross product of these two vectors to help us find the perpendicular vector. The cross product works by finding a vector which has no effect on the position of a point with respect the the di...
AR
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What is a gene?

A gene is a small section of DNA which codes for a single protein. DNA is made up of a linear sequence of nucleic acids, which may be either A, T, C or G. Three nucleic acids make up a code for one amino aci...
RA
Answered by Rosie A. • Biology tutor
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Work out the gradient and y-intercept of the straight line with points A(3,8) and B(-2,-7)

Y= mx + cFinding m : change in y/ change in x => (8--7)/(3--2) = 3Finding c : input a pair of coordinates => 8 = (3 x 3) + c .... c = -1y = 3x -1
KR
Answered by Kim R. • Maths tutor
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What is the difference between type 1 and type 2 diabetes?

Type 1 diabetes is an auto-immune condition. The body has developed an immune response to the cells of the pancreas that produce insulin. Therefore, insufficient to no insulin is produced. Type 1 diabetes is...
JB
Answered by Jessica B. • Biology tutor
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How does the body control blood sugar?

The level of sugar ( glucose ) in the blood is monitored by the pancreas. When blood sugar is too high, the hormone insulin is produced by the pancreas and released into the blood stream. Insulin promotes su...
JB
Answered by Jessica B. • Biology tutor
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