Top answers

Why is the heart known as a double pump?

The heart is known as a double pump becasue each half pumps blood around a different circulation system. The right side pumps blood to the lungs, while the left side pumps blood around the body.
DH
Answered by David H. • Biology tutor
65178 Views

How can I make the difference between the 'passé simple' and the 'imparfait'

The 'passé simple' is a tense for a past, finished action whereas, the 'imparfait' is used to describe an action in the past, longer and maybe unfinished. Passé simple is a precise moment whereas Imparfait i...
FB
Answered by Florence B. • French tutor
7418 Views

I don't understand what exactly a mole is, could you please explain it to me?

Basicallly a mole refers to a number, in the same way as a dozen also refers to a number, this number being 12. Except instead of 12, the word mole refers to the number of 6 x 10 23 , which is basically a 6 ...
AP
Answered by Andrea P. • Chemistry tutor
4647 Views

What is the difference between direct and indirect object pronouns?

A pronoun is a word that is used in place of a noun, often to avoid repetition. If we are replacing the object of a sentence with a pronoun, we will be using either the direct object pronoun (DOP) or indirec...
NB
Answered by Nic B. • French tutor
15528 Views

What is the fraction of blue beads?

A tin contains red, white and blue beads in the ratio red:white:blue = x:2x:x^2 First we should find the total number of beads in the tin: x + 2x + x^2 = 3x + x^2 The number of blue beads is x^2 So the fract...
RB
Answered by Rheanne B. • Maths tutor
7676 Views