Top answers


How is oxygen moved from the lungs to the blood?

When oxygen reaches the alveoli of the lunngs, it diffuses into the blood. The oxygen enters the red blood cells and combines with the haemoglobin to form oxyhaemoglobin. When the red blood cells reach the t...
OA
9025 Views

How do I analyse a historical source?

Sometimes when faced with many historical sources at once that all discuss a similar topic, it can be hard to know where to start. By following a simple structure, you can be sure to achieve the best grades ...
BB
Answered by Beth B. History tutor
4326 Views

Explain the difference between direct and indirect costs.

Businesses have many different costs to pay when running. We can categorise these costs into different categories, such as direct and indirect costs. A direct cost is though of as being affected by the numbe...
BC
Answered by Barnaby C. Economics tutor
5089 Views

What is the significance of a reactant being zero, first, or second order when calculating the rate of a reaction?

In simple terms, we need to know whether a reactant is first, second or zero order if we want to understand what effect changing the concentration of that reactant has on the rate of the reaction. Zero order...
NB
Answered by Naomi B. Chemistry tutor
12425 Views

How would I differentiate cos(2x)/x^1/2

So for this question you can use either the product rule or the quotient rule and I'll run through them both.First the quotient rule:The quotient rule says that if you have h(x)=f(x)/g(x)Then h'(x) = (f'(x)g...
GS
Answered by George S. Maths tutor
9986 Views