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Please describe the change in velocity of someone falling from a plane before they open their parachute

At first, when the parachutist is at 0ms-1 velocity (about to fall) there is only Weight acting downwards on the person, so the resultant force is down. F=ma, therefore the parachutist accelerates downwards....
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Answered by Pearl E. • Physics tutor
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How would you work out the equation of the normal at a point (2,5) given the equation of a line?

You are given the equation of a line in the form of y=mx+c. From this, you know that 'm' represents the gradient, which can also be represented as dy/dx. We now need to work out the gradient of the normal li...
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Answered by Rohil C. • Maths tutor
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What is the difference between 'Electrospray Ionisation' and 'Electron Impact' during the ionisation stage in a mass spectrometer?

Mass Spectrometry is often used by scientists to determine all the isotopes present in a sample (using their isotopic masses) and thus identify the element. The first stage is called the 'ionisation stage' a...
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Answered by Rohil C. • Chemistry tutor
35538 Views

Explain how a reduction in interest rates affect AD.

Interest rates are the cost of borrowing money expressed as a percentage of the amount borrowed. A reduction in the bank rate by the MPC (Monetary Policy Committee) would result in banks offering lower inter...
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Answered by Rohil C. • Economics tutor
3572 Views

Evaluate the view that a depreciation of a nations currency, will always be a benefit to it's economy.

Firstly, a depreciation of a currency; such as the 'pound sterling' in the United Kingdom, can be defined as a fall in the external value of the currency in relation to another currency of another country. T...
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Answered by Michael M. • Economics tutor
3780 Views