Top answers

What is meant by the term stroke volume?

Stroke volume is the amount of blood, in one contraction, that is pumped from the left ventricle of the heart. The normal range for this is 50-100ml.
LK
Answered by Livia K. • Biology tutor
4735 Views

How do we use the Chain-rule when differentiating?

The Chain-rule is used to differentiate a function of a function. Running through an example:Let's say want to differentiate the function y = (2x+1)^3. We can substitute a variable, w, in order to differenti...
HR
Answered by Hira R. • Maths tutor
4966 Views

Define the term ‘externalities’

An externality is a positive or a negative effect experienced by a third-party to an economic transaction. In production for example, an externality would occur when there is a difference in the marginal pri...
EE
Answered by Edward E. • Economics tutor
2350 Views

At room temperature and pressure, the first 4 alkanes are all gases, but the first 4 alcohols are all liquids. Explain this.

Alkanes are non-polar so only have London forces between them. These intermolecular bonds are weak, and easily overcome with little energy. This means that alkanes have a low boiling point hence they are gas...
AE
Answered by Ayolola E. • Chemistry tutor
17523 Views

In a perfectly competitive labour market, explain how equilibrium wages are determined by the forces of supply and demand.

The labour market is a factor market, which is a market where the factors of production are traded. The supply of labour comes from the pool of economically active citizens who want to be employed. Labour de...
AJ
Answered by Anish J. • Economics tutor
2888 Views