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How well judged were the domestic and foreign policies of Mary I?

For any history essay question which requires you to present an argument, students should remain strictly analytical in their answer. It is key that they fully and clearly explain the value each piece of evi...
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Answered by Thomas S. • History tutor
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Discuss the ethical ramifications of P. Foot’s Trolley Problem.

To answer this question there are two areas of focus – structure and content. For a philosophy essay it is important that each point follows a logical progression; one paragraph will lead nicely onto the nex...
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a) A car weighs 1500kg, if it is travelling at 7m/s, how much kinetic energy does it have?

To determine the kinetic energy of the car, we need to use the formula for kinetic energy. The formula is KE=(1/2)mv^(2) where m is the mass of the object (in kg) and v is the speed of the object (in meters ...
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Answered by Wilf S. • Physics tutor
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Describe the structure of proteins.

Proteins are macromolecules found within living organisms that have an array of crucial functions, including catalysing enzymatic reactions and providing structural stability to cells. At the basic level, al...
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Answered by Abbie C. • Biology tutor
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The reaction for the Haber process is shown below. N2(g) + 3H2(g) ⇌ 2NH3(g) What will be the effect of increasing the pressure on the amount of ammonia present at equilibrium? [1 mark]

Increase. This question is looking at a reversible reaction - the reaction can occur both forwards and backwards. Firstly to answer this question you need to appreciate that in a closed reaction the equilibr...
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Answered by Rebecca V. • Chemistry tutor
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