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Answer:2/9On the first pick of the bag, there are 10 balls in total. Out of these balls, 5 are green. Therefore the probability of picking a green ball will be 5/10 or 1/2. On the second pick of the bag, ...
Answer: 20ms-1The gravitational potential energy before the ball is dropped is equal to mgh. This gives the ball a maximum gravitational potential energy of 5.0kg * 9.8N/kg 20m which is equ...
Answer: 1.96108ms-1.Snell's law tells us that n1sin(x1)= n2 sin(x2) where x is the angle of a light ray from the normal. Air can be as...
13cm. Using Pythagoras theorem a^2 +b^2 =c^2 we substitute our two known lengths into the equation to get 5^2 + 12^2=c^2.So now we have c^2= 25+144. So c^2 =169. So c=√169 = 13. Don't forget the un...
Confidence in your mathematical ability and subsequent answers in an exam is key. During an exam you should be confident with the answers that you are giving which can be achieved with steady revision and...
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