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How might an uncharged object become positively charged? (e.g. AQA Higher specimen paper 1)

Ask student what causes charge, i.e. motion of electrons.

So answer is that electrons move away from the object leaving it positively charged, or move onto a neutral object leaving it negatively ch...

Answered by Joanna W. • Physics tutor

14832 Views

Expand and simplify (6x+9)(4x+7)

Using the "crabs claw" or "parrot beak" method, draw lines linking the two brackets (demonstrated on whiteboard)

6x x 4x = 24x²

JG
Answered by Jenna G. • Maths tutor
4466 Views

How do you deal with 3 simultaneous equations? (Struggling with Q7 of AQA specimen paper 1)

If you need to solve them, then you just plug your way through the algebra to get to the answer.

In this question (Q7) you need to find the value of a constant such that there is no solution to the...

Answered by Joanna W. • Further Mathematics tutor

2796 Views

How do you work out compound interest?

Check whether student can calculate simple interest, e.g. How much money would you have after 1 year if you have £50 and get 3% interest? (Ans: 50*1.03 = 51.50)
Once this is un...

Answered by Joanna W. • Maths tutor

3245 Views

what would be the mass required to keep an object with a mass of 250kg orbiting at a constant distance of 100km with a linear velocity of 100m/s?

the linear speed of an orbiting body is given by the equation sqrt(GM/2r) where M is the mass of the attracting body, G is the gravitational constant and r is the distance between the two bodies' centres ...

Answered by Michael A. • Physics tutor

1789 Views