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Find the area of a sector with a radius of 5cm and an angle of 120 degrees?

pi r r pi 5x5 25pi = 360 degrees 120/360 x 25pi = 25/3 pi Teaching Points: Area of a circle + other formalue for circumfrence Degrees of a circle Fractions Dealing with Pi Terminology of sector + cord + tang...
AP
Answered by Anish P. • Maths tutor
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Which of these is a correctly balanced equation for respiration? C6H12O6 + 3O2 → CO2 + 3H2O C6H12O6 + 6O2 → 6CO2+ 6H2O C6H12O6 + 6O2 → 6CO2 + 3H2O

Teaching points: Go through balancing equations Formalae of glucose Different types of Respiration - and how to balnce other equations Respiration in animals vs plants By product of Lactic acid - what it is ...
AP
Answered by Anish P. • Biology tutor
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How is the resting membrane potential produced in typical mammalian neurons?

The membrane potential describes the movement of charged ions across a membrane. A positive membrane potential indicates net movement of positive charge into the cell, or net movement of negative charge out....
AT
Answered by Alex T. • Biology tutor
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i) Write a full balanced equation for (a) the complete combustion of glucose and (b) the incomplete combustion of glucose. ii) Following from part i) suggest a reason (and explain) the difference with the product in reaction (a) and that of reaction (b).

Part I (4 marks) a) C 6 H 12 O 6 + 6O 2 -> 6CO 2 + 6H 2 O b) C 6 H 12 O 6 + 3O 2 -> 6CO + 6H 2 O Part II (2 marks) Equation (a) could be carried out in an open vessel where there is an excess of oxygen...
LG
Answered by Lavan G. • Chemistry tutor
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How do you measure the gradient of a straight line joining two points?

There is a simple method for working out the gradient of a straight line joining any two points, for which the X and Y coordinates are known. For instance, if our first point is: A(X 1 ,Y 1 ), and our second...
AT
Answered by Alex T. • Maths tutor
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