Top answers

What is allopatric speciation?

When two populations of a species are isolated geographically (for example by a river, mountain, flood etc). The two populations adapt to different selection pressures and so then eventually evolve into two ...
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Answered by Isabella P. • Biology tutor
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A small ball of mass 150 g is placed at a height of 20cm above the ground on an incline of 35°. It is released and allowed to roll down the slope; what will be the ball's speed when it reaches the ground? Assume friction and air resistance can be ignored.

This question is best solved using conservation of energy, since it is stated that friction and drag (non-conservative forces) can be ignored.When the ball is released at the top of the slope, its initial sp...
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Answered by Rhys S. • Physics tutor
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how is an ation potential generated?

An action potential is generated within the axon of a neuron via a series of steps:1) the inside of the neuron at rest is negative (-70mV), called the resting potential2) Na ion channels open and inside of t...
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Answered by Alexander L. • Biology tutor
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Given y=2x^4-1+x^1/2, solve dy/dx

Using the sum rule, you can split the function in three terms and then derive each of them separately. The rule is to bring down the power and the power minus one. So for the first term, it becomes 2*4x 4-1 ...
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Answered by Yanni C. • Maths tutor
3994 Views

Discuss the likely effects of expansionary monetary policy.

Expansionary monetary policy is the use of a central bank's money supply and interest rate manipulation to stimulate aggregate demand and aggregate supply. This is done through raising the money supply, like...
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Answered by Eric S. • Economics tutor
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