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What is Pythagoras' Theorem and how do I use it?

Pythagoras' Theorem is used to find the length of the hypotenuse (longest side, opposite the 90 degree angle) of a right angled triangle when the length of the other 2 sides are known.The equation is a 2 +b ...
ST
Answered by Sophie T. • Maths tutor
3610 Views

Explain why a rise in investment should help to increase the rate of growth of the UK economy

Investment is part of Aggregate Demand (AD). If there is an increase in investment then there will be a rise in the demand for capital goods and this means that the firms supplying the goods will have an inc...
PM
Answered by Peter M. • Economics tutor
11910 Views

Explain how two different species of rabbits could have developed from a common ancestor?

The population of rabbits (common ancestor) must have gotten seperated to form two populations. This could have happened due to a geographical barrier (such as an earthquake) . These two environment must hav...
PJ
Answered by Precious J. • Biology tutor
4010 Views

An electron is traveling at a velocity of 500m/s perpendicular to a uniform magnetic field. A force of magnitude 4.32 x10^(-16) N is acting on the electron, what is the magnetic flux density of the field?

F=BQv so B=F/Qv (Q is the charge of an electron, 1.6 x10 -19 C) so B=4.32 x10 -16 / (1.6 x10 -19 x 500) = 5.4 T
CJ
Answered by Christian J. • Physics tutor
2110 Views

What product would you expect to obtain when reacting ethanal (or acetaldehyde) with potassium cyanide (KCN) in dilute acid? Draw a curly arrow mechanism for this transformation, and determine whether you obtain one enantiomer or a racemic mixture.

The product obtained is a cyanohydrin, with the formula CH3CH(OH)(CN) where the cyanide anion has acted as a nucleophile towards the aldehyde. The mechanism would first show the lone pair on the carbonyl oxy...
AS
Answered by Alex S. • Chemistry tutor
3407 Views