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How does a river profile alter with distance downstream?

A rivers long profile typically varies in accordance with the upper, middle and lower course. The upper course typically has a steeper profile, a v shaped bottom, is narrower with faster flowing water. Water...
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Answered by Theo S. • Geography tutor
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How is the structure of the lung adapted for respiratory function?

The lung can be divided into different sections regarding its function. The tube that connects the airway to the lungs is called the trachea, which is made of cartilage rings. These are flexible, and allow s...
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Answered by Rebecca I. • Biology tutor
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Explain the processes involved in eutrophication

Eutrophication is where a surplus of nutrients in a lake or pond leads to an overgrowth of plant life, causing a shift in the biodiversity. There are 5 steps to this process: Step 1: The use of fertilisers o...
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Answered by Rebecca W. • Biology 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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