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How does refraction work?

The fastest light can travel is when it is in a vacuum, where it travels at 3x10^8 metres per second. However, when light travels through another substance or material (another 'medium'), it gets slowed down...
CP
Answered by Conor P. • Physics tutor
12926 Views

How do I use equations of motion ('suvat') to find a missing quantity?

First, be familiar with the equations of motion:s = displacementu = initial velocityv = final velocitya = acceleration (constant)t = time v = u + ats = ((u+v)t)/2s = ut + (at^2)/2v^2 = u^2 + 2as Second, iden...
JH
Answered by Jessica H. • Physics tutor
4376 Views

why does applying the brakes of a car cause the temperature of the breaks to increase?

The increase in heat is caused by friction between the brakes and the wheels. This work done between the brakes and the wheels, causes a decrease in kinetic energy in the wheels, resulting in an increase in ...
HH
Answered by Hugo H. • Physics tutor
16450 Views

Why is the area of a triangle 1/2 * b * h?

This question is more easily answered with the help of multiple diagrams, but:1) Draw a rectangle, and draw a line between the top left corner and the bottom right corner. This line divides the rectangle in ...
TD
Answered by Tutor5499 D. • Maths tutor
6318 Views

How do I factorise 12y-18

When we factorise we basically want to put an equation into brackets.Firstly we need to see what can be taken out of both parts of the equation.Both 12 and 18 divide by 6. 12/6= 2 and 18/6 = 3So we can take ...
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Answered by Remi G. • Maths tutor
11170 Views