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How would I go about planning and structuring my essay in the exam?

You should have an advised time period to spend on planning and writing your essay within your exam depending on how long it is (e.g. 25 minutes planning 40 minutes writing). Firstly, read the essay question...
ES
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An Electric Kettle is used to boil water. After the water is boiled, the temperature of the water decreases by 22C. The mass of water in the kettle is 0.50 kg. The specific heat capacity of water is 4200 J/kg C. Calculate the energy transferred.

First, we need to recognise which equation to use. From the Physics Equation Sheet, we can see that the correct equation here is that dQ=m c dT, where dQ is the Energy transfer. Using this equation, we can s...
TJ
Answered by Tom J. • Physics tutor
28894 Views

The mass, m grams, of a substance is increasing exponentially so that the mass at time t hours is m=250e^(0.021t). Find the time taken for the mass to double in value.

All exponential equations can be reduced to the form m=m 0 e kt , where m 0 is the initial mass. This means for our equation the initial mass is 250g. If the mass has doubled in size, then m now equals 2*250...
TJ
Answered by Tom J. • Maths tutor
8950 Views

How can I determine the stationary points of a curve and their nature?

For example, y = 3x 3 + 9x 2 + 2. Determine the stationary points and their nature. Let's remind ourselves what a stationary point is, and what is meant by the nature of the points. A stationary point is a p...
TD
Answered by Tutor87017 D. • Maths tutor
171919 Views

What is the difference between aerobic and anaerobic respiration?

Aerobic respirtation is the process by which glucose and oxygen go to form carbon dioxide and water. The reaction occurs in the mitochondria. The process is needed to release energy. The chemical equation of...
AH
Answered by Aiden H. • Biology tutor
7755 Views