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What are the two types of waves and what are some of their uses/sources?

Transverse:Radio signalsElectromagnetic radiationTVPhone serviceOcean wavesLongitudinal:Seismic wavesSound wavesect.

Answered by • Physics tutor

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What is the general formula for Hydrocarbons?

Hydrocarbons have Hydrogen-Carbon bonds and carbon-carbon bonds. The formula is H_nC_2n+2This is made clear when diagrams are drawn from different hydrocarbons and you can deduce this ...

Answered by • Chemistry tutor

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Explain how blood glucose level is controlled.

Blood glucose level is controlled by two hormones, insulin and glucagon. These are produced by the pancreas. If the blood glucose (sugar) level is too high, then insulin is released. This causes glucose i...

Answered by Amy W. • Biology tutor

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A rectangle has an area of 20 cm2. Its length and width are enlarged by scale factor 3. Find the area of the enlarged rectangle.

Area of rectangle is 20 cm². The new area of the enlarged rectangle is the original area, 20 cm², times the area scale factor. We are only given the length scale factor, therefore, w...

Answered by Paulina B. • Maths tutor

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Solve 7(x+2)=5x+21

The first thing we must realise is that there are brackets in this equation and thus this has to be dealt with. We expand out the brackets on the left side by multiplying 7 by x and 2 to obtain '7x+14'. W...

Answered by • Maths tutor

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