Top answers

Why does the equation x^2+y^2=r^2 form a circle in the Cartesian plane?

The general line equation in the Cartesian plane is given by a x+b y=c, where a, b, and c are given constants. This means that all (x_0, y_0) points that are situated on the line satisfy the equation a x_0+b...
BS
Answered by Bálint S. • Maths tutor
16657 Views

Describe the process by which an action potential is propagated across a cholinergic synapse

A cholinergic synapse is one which uses acetycholine (ACh) as it's neurotransmitter. When the action potential reaches the synaptic knob at the presynaptic cell it leads to voltage gated Ca 2+ channels in th...
DM
Answered by David M. • Biology tutor
3604 Views

How should I structure a history essay?

A history essay should contain an introduction, around three sections containing your argument, and a conclusion. The introduction should be brief and should set out a basic answer to the question, and indic...
FC
Answered by Flora C. • History tutor
2890 Views

FP2 (old specification) - How do you find the derivative of arsinhx?

y = arsinhx We can rearrange this to be 2) sinhy = x, which makes this challenge slightly easier as we know that the derivative of sinhx is coshx and vice versa.Knowing the above we get coshy(dy/dx) = 1, we ...
LM
Answered by Lois M. • Maths tutor
7872 Views

Discuss some of the challenges faced by urban areas in the UK as a result of urban change?

The challenges facing urban areas in the UK can broadly be categorised into two types, socio-economic and environmental challenges. The socio-economic challenges are those which impact the people in the area...
AR
Answered by Amie R. • Geography tutor
3314 Views