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How has stress been linked to addiction?

There have been many studies into this area. For example, in 2008, Driessen and his team found that 30% of drug addicts and 15% of alcoholics suffered from post-traumatic stress disorder. This shows a clear ...
BC
Answered by Bobbie C. • Psychology tutor
4478 Views

Prove e^(ix) = cos (x) + isin(x)

We first write each side of the equation using the maclaurin series for each function. e ix = 1 + ix + (ix) 2 /2! + (ix) 3 /3! + (ix) 4 /4! + ...... e ix = 1 + ix - x 2 /2! - ix 3 /3! + x 4 /4! + ..... cos(x...
PM
9097 Views

Whats the best way to keep my Spanish sharp outside of school?

People rarely enjoy the idea of homework outside of the classroom, but there are ways you can keep your Spanish topped up with minimal effort, whether at home or on holiday. Firstly get into a habit of liste...
OM
Answered by Oliver M. • Spanish tutor
3701 Views

How is an electrical impulse transmitted through the heart?

Contraction of the heart is myogenic meaning it initiates from within the heart muscle itself (myo=muscle, genic= created). Therefore, no extra nerves need to signal the heart to contract which is important ...
RZ
Answered by Rebecca Z. • Biology tutor
19857 Views

Don't know how to write a good essay?

I am a History Undergraduate at Durham and studied History A Level at City of London School for Girls, giving me a pretty good idea of how to both write, and teach others to write a good essay. I won the Cor...
HC
Answered by Hannah C. • History tutor
4120 Views