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What is meant by the 'circulation systems' in terms of blood flow?

There are two circulatory systems in the body that enable blood to flow around the body. One system is between the heart and the lungs, and the other is from the heart to every other part of the body. The he...
TD
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Find the volume and surface area of a cylinder, of length 20cm and radius 5cm.

A diagram is often helpful to draw for questions like this. 1.) Volume. For the volume of a cylinder, you must first find the area of the face, and multiply by the length. The formula for this is Vol= πr^2 ....
CL
Answered by Cameron L. • Maths tutor
10025 Views

How can you calculate the distance between 2 points in a grid if they're not on the same horizontal or vertical line?

Recall Pythagoras' theorem. a^2 + b^2 = c^2. Think about this as a triangle, with a and b being the lengths of the 2 perpendicular sides, and c being the length of the hypotenuse. [Drawing on a whiteboard wo...
TC
Answered by Tom C. • Maths tutor
4993 Views

When do you use the article with possessive adjectives? And when do you omit?

The general rule of thumb with Italian is that possessive adjectives use a definite article alongside them (e.g. il mio libro, la sua macchina). The only exception to this rule is with family members, where ...
FK
Answered by Freddie K. • Italian tutor
4671 Views

How do you solve a simultaneous equation?

Take 2 equations say equation 1: 2y+4x=26 and equation 2: y+3x= 18. What we need to do is make either the two x values or the 2 y values be equal so that we can subtract one of the equations from the other. ...
BS
Answered by Bryony S. • Maths tutor
4642 Views