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A man decides to shoot a rifle whilst on a wheelchair. Explain in terms of conservation of momentum what happens to the man as the shot is fired.

Assume that initially the wheelchair is stationary. When the rifle is fired a bullet travels in the forward direction. Conservation of momentum states that the momentum before an action is the same as the mo...
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Answered by Matthew H. • Physics tutor
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Why does copper make a good metal to use in electrical wiring?

Copper, like all metals, is a conducter of electricity. Copper is particularly effective because of the way its electrons are arranged allows for more free movement of electrons which allows for more efficie...
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Answered by Matthew H. • Chemistry tutor
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Rationalise the denominator of the following fraction: 1/(√2 + 1)

We start with 1/(√2 + 1) Normally with rationalising surd denominators we multiply the top and bottom of the fraction by the denominator. But this time we have a surd ADDED by a rational number. In this case...
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Answered by Richard M. • Maths tutor
33892 Views

The Curve C has the equation 2x^2-11+13. The point Q lies on C such that the gradient of the normal to C at Q is -1/9. Find the x-co-ordinate of Q

The first ste here is the find the general equation for the gradient tangential to the curve. This is done by differentiation of the equation to give 4x-11=dy/dx. dy/dx is the gradient. Now we are given the ...
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Answered by Matthew H. • Maths tutor
5385 Views

What is the role of aspect in Russian?

The two forms of aspect in Russian (the imperfective and the perfective) essentially function in the same way as the perfect and imperfect tenses do in other languages. For example, if in English you wish to...
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Answered by Matthew B. • Russian tutor
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