Top answers

What are the differences in writing an SAQ and an LAQ?

For an SAQ (Short-Answer-Question) the best thing is to be as concise as possible, as you are aiming for a word count of about 250-300 words. What the examiners want is to be reading accurate information tha...
VT
Answered by Valerie T. • Spanish tutor
26583 Views

How do I use the conservation of linear momentum to solve problems?

The linear momentum of a particle is defined as the product between the particle’s velocity (a vector) and the particle’s mass (a scalar quantity): p =m· v . The law of conservation of momentum states that t...
EC
Answered by Ellis C. • Physics tutor
3513 Views

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
12853 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
4300 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
16329 Views