Top answers

How do I know when to use preterit or imperfect tense?

This is something that many students struggle with but luckily it is simpler than it seems and once you know it, you know it! I like to use an example that I can refer back to if I get confused: Estaba leyen...
TM
Answered by Tabitha M. • Spanish tutor
3762 Views

At what angle does total internal reflection occur?

This question is to do with the refraction that occurs when a light ray hits a boundary between two media of different refractive index. We know that the relationship between the angle of incidence and angle...
AS
Answered by Alex S. • Physics tutor
5117 Views

2x + 7 = 13 - 2x. What is the value of x?

4x +7 = 13 4x = 6 x=6/4 x=3/2
JL
Answered by Joshua L. • Maths tutor
12072 Views

Tom and Lesley are married and have a child, Sally, who has Cystic Fibrosis. Lesley has just found out she is pregnant, so what is the probability that the baby will have the condition?

Cystic Fibrosis is a recessive disease, therefore for Sally to have the condition she must have a homozygous recessive genotype, with one recessive allele of the gene from the mother and one from the father....
LD
Answered by Lillie D. • Biology tutor
3074 Views

What is a 'convention' in UK politics?

Conventions are one of the sources of the UK constitution. They are effectively unwritten rules which regulate the conduct of government. An example is the Salisbury Convention, under which the House of Lord...
MA
20368 Views