Search our library of homework questions

Top answers

All subjects

All levels

Describe the effects of cigarette smoke on the airway.

Cigarette smoke contains a number of harmful chemicals such as Tar, Carbon monoxide and Nicotine.

Tar settles on the lining of the airway and alveoli, increasing the diffusion distance for the gase...

Answered by Kristen D. • Biology tutor

6127 Views

What are Enzymes and how do they work?

What is an Enzyme?
Enzymes have an essential role in the reactions in the body from respiration to digestion. Enzymes are globular proteins with a specific tertiary shape.

Answered by Katie D. • Biology tutor

24091 Views

Expanding a quadratic equation (x-3)(x-2)=0

Focus on the left hand side of the equation: (x-3)(x-2) These are two factors, basically that (x-3) is a number, and (x-2) is another number. (x-2)(x-3) is just showing that you're multiplying these numbe...

Answered by Daniel W. • Maths tutor

5893 Views

Describe Milgram's obedience study

Milgram was interested in why so many people can carry out inhumane acts when instructed by someone in authority, in particular the Nazi soldiers in World War 2. He questioned whether people could be held...

Answered by Dana R. • Psychology tutor

2316 Views

When do I use Sin, Cos and Tan?

Just remember SOH,CAH,TOA. It sounds like Sock-A-Toe-Ah. Quite strange but extremely effective. SOH means Sin=Opposite/Hypotenuse Cos=Adjacent/Hypotenuse Tan=Opposite/Adjacent The three letters in each ab...

Answered by Darren C. • Maths tutor

3271 Views