Top answers

How is frequency density calculated?

Frequency divided by class width
UY
Answered by Umamah Y. • Maths tutor
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What is a ligand?

A species with one or more valence electron pairs that forms co-ordinate bonds with a metal ion.
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Answered by Umamah Y. • Chemistry tutor
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What are the two main secondary structures of proteins?

Alpha helices and Beta pleated sheets.
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Answered by Umamah Y. • Biology tutor
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Megapode birds open and close the air vents of the nest at different times of the day. Suggest reasons why it is necessary to open and close the air vents.

There are a number of reasons why it is necessary to open and close the air vents. These include; allowing oxygen in, which is also necessary for respiration and allowing heat to escape. Closing the air vent...
DR
Answered by Davina R. • Biology tutor
13612 Views

y is proportional to x^2. When y is 75, x is 5. Find a formula for y in terms of x

y is proportional to x 2 so this means y = A*x 2 for some constant A. When y = 75, x = 5. Put these values in the formula above to find A: 75 = A*25 75/25 = A A = 3 So y = 3x 2
TM
Answered by Thomas M. • Maths tutor
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