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A light wave with wavelength 590nm shines upon a metal and causes it to emit an electron with a speed of 5x10^5 m/s. What is the work function of the metal?

The first step for this question is to find out how much energy is absorbed by the electron above its work function. This is found with the kinetic energy equation: K.E.=1/2mv^2 The mass of an electron is 9....
BJ
Answered by Bevan J. • Physics tutor
3099 Views

Differentiate y=x^3*(x^2+1)

As this is a product of two functions it is necessary to use the product rule for differentiation. Therefore one of the functions must labeled v and the other u. i.e. u=x^3 and v=(x^2+1). It is then necessar...
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Answered by Bevan J. • Maths tutor
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A right-angled triangle has an angle of 30 degrees and its hypotenuse has a length of 9cm. Find the length of either of the triangle's other two sides.

Please note that this solution is easier to explain with 2 diagrams The side opposite of the 30 degree angle: If we have the hypotenuse and require the length of the opposite side then we would use sin ( Soh...
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Answered by Ciaran B. • Maths tutor
5373 Views

What is meant by absolute poverty and analyse how access to clean water, or another essential item, is closely linked to production, income and wealth, within countries and between countries.

Absolute poverty is characterised by acute deprivation of human needs such as: food, safe drinking water, shelter, education and information. Consequently, absolute poverty is seen mostly in low economically...
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Answered by Ciaran B. • Economics tutor
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Describe how information passes across a synapse.

A chemical called a neurotransmitter passes from one neurone to the next causing an electrical impulse.
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Answered by Jordan H. • Biology tutor
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