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a x 10^4 + a x 10^2 = 24 240 where a is a number. Work out a x 10^4 - a x10^2 Give your answer in standard form.

From first principles: ax10^4 is the same as a0000. ax10^2 is the same as a00 So, a0000 a00 a0a00 If we look at this pattern and compare to the number in the question: a0a00 | | 24240 the a0 corresponds to t...
JB
Answered by Joe B. • Maths tutor
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A cannon ball is shot at an angle of 60 degrees from a cliff of height 50m, if it's inital speed is 20ms^-1 what horizontal distance does it travel before hitting the ground.

This question uses the equations of motion, commonly referred to as the SUVAT equations. We will need to consider the horizontal and vertical components of motion separately. As the vertical component determ...
JA
Answered by Jack A. • Physics tutor
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Describe the structure of proteins

Proteins are amino acid polymers, joined by peptide bonds which are formed via condensation reactions. The primary structure is the order of amino acids, secondary structure is the folding of polypeptide cha...
AC
Answered by Anthony C. • Biology tutor
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Express 1/((x^2)(1-3x) in partial fractions.

This is a step above a partial fraction question seen in core 1 and core 2, made mkre difficult due to the double (repeated) root of x. To solve this we must consider that there is 3 separate roots, x, x^2 a...
JA
Answered by Jack A. • Maths tutor
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What is a convection current?

A convection current is the way that heat is transferred throughout a fluid. By fluid, we mean a liquid or a gas, where the molecules are free to move. Imagine a cup of water being heated from the bottom. Th...
LC
Answered by Luke C. • Physics tutor
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