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Question: A particle is moving in a straight line with simple harmonic motion. The period of the motion is (3pi/5)seconds and the amplitude is 0.4 metres. Calculate the maximum speed of the particle. ...
Question: There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.Answer: total mar...
Any odd integer can be represented by 2m+1 for some integer m (can prove that 2m+1 is always an odd number if needed). (2m+1)2=4m2+2m+2m+1=4m2+4m+1=4m(m+1)+1 simple factor...
In complete combustion, there is a sufficient supply of oxygen which is able to react with the burning hydrocarbon allowing the reaction products H2O and CO2 to be formed.In in...
To achieve top marks when tackling an 'explain' question, it is important to not only have 3 reasons for why something happened, but also to prioritise and link these reasons. For example, it is not enou...
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