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Find the equation of the straight line passing through the origin that is tangent to the curve y = ln(x).

Firstly, recognise the relevant equations. The two functions are y = mx and y = ln(x). As the straight line is a tangent, we know that at a certain point x 0 , the functions and their gradients are equal. Th...
PS
Answered by Paul S. • Maths tutor
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What type of blood does the pulmonary artery contain?

Deoxygenated blood
KS
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An extract of DNA contains 4000 base pairs. The extract is identified to contain 300 guanine bases. How many adenine bases can be found in the DNA extract?.

3700
KS
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Explain how the physical properties of water enable organisms to survive over a range of temperatures.

Water has a very high specific heat capacity due to the collective forces of the many hydrogen bonds. A lot of energy goes into breaking these bonds rather than raising the temperature of the water, hence pr...
AB
Answered by Arunima B. • Biology tutor
24588 Views

What are the 2 methods used to manufacture ethanol? What are the advantages and disadvantages of both?

The hydration of ethene: Ethene and steam are passed over a catalyst - concentrated phosphoric acid (H 3 PO 4 ) - at 300 O C and 60-70 atmospheres. This process is fast, continuous and gives a pure product b...
JP
Answered by James P. • Chemistry tutor
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