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Describe the transfers of energy occurring when a ball is thrown vertically up in the air and falls back down to Earth, assuming there is no friction from the air.

When the ball is thrown, chemical energy in the muscles of the person is transferred to the ball as kinetic energy. As the ball rises, kinetic energy is transferred to potential energy as the ball slows down...
OT
Answered by Oliver T. • Physics tutor
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A student wishes to determine the concentration of sulfuric acid. They run a titration and discover that 62.5cm^3 is needed to neutralise 20cm^3 of sodium hydroxide of concentration 2moldm^-3. Work out the concentration of the acid.

To answer this question the first thing that needs to be done is to write a chemical equation, making sure it is balanced and includes state symbols:H2SO4 (aq) + 2NaOH (aq) --> Na2SO4 (aq)+ 2H2O (l)Next w...
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Answered by Ellen C. • Chemistry tutor
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How would I make S the subject of the formula in the equation V^2 = U^2 + 2AS

So the best way to solve subject of the formula questions is to try and separate the term you want to make the subject , in our case S , from the rest of the terms in the equation. In order to start we have ...
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Answered by Joshua R. • Maths tutor
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Could you explain to me the advantages and disadvantages of crowd funding to a business as a long term source of finance

Crowd Funding is when a business uses an online platform in order to raise money from several small investments in exchange for small rewards like a T-shirt or a share in the business. Some advantages of cro...
JR
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Solve the simultaneous equations: 4x + 2y = 26 and 3x + 3y = 21

Let eq 1 = 4x + 2y = 26 eq 2 = 3x + 3y = 21 Using the elimination method: You need to make either the xs or ys have the same constant term in both equations( sign does not matter). In this case, we will make...
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Answered by Dermot N. • Maths tutor
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