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Cylinder A has the volume 8π cm^3 and the height 2 cm. Cylinder B is a similar shape with a volume of 216 cm^3. i) find the linear scale factor. ii) find the surface area of cylinder B

i) Linear scale factor cubed = volume scale factor = V B /V A = 216π/8π = 27 LSF 3 =27 LSF = 3 ii) SA B = 2πr B 2 + 2πr B H B Find H and r for B H B = LSF*H A = 6 cm V B = πr B 2 H B = 216π = πr B 2 6 => ...
JK
Answered by Jacob K. • Maths tutor
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Explain why having more red blood cells per cm3 of blood is an advantage to an athlete. (3 Marks)

Red Blood Cells (RBC’s) contain haemoglobin. Therefore, more RBC’s results in more haemoglobin present.Haemoglobin carries oxygen, therefore, more oxygen can be transported to cells such as muscle cells.More...
BG
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Explain the physical properties of graphite in terms of its structure and bonding

Graphite is a giant covalent molecule . This means it has many atoms joined together by covalent bonds. Graphite consists of layers of carbon atoms joined together by covalent bonds with delocalised electron...
ED
Answered by Eliza D. • Chemistry tutor
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Edexcel November 2016 1H Maths. Q27

The sphere has radius 6 cm. The solid cylinder has a base radius of 3cm and a height of h cm. The total surface area of the cylinder is twice the total surface area of the sphere. Work out the ratio of the v...
JV
Answered by Josh V. • Maths tutor
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What is the difference between the verbs 'ser' and 'estar'?

The verbs ser and estar both translate as 'to be'. Its important to learn the differences between them. Ser is used to talk about permanent attributes. A useful tool to remember exactly when we need to use s...
LH
Answered by Louisa H. • Spanish tutor
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