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Why at room temperature is H2O a liquid, but H2S is a gas?

This question is basically just asking you why water has a higher boiling point that H2S. So you need to ask yourself what is the factor which means water has a higher boiling point? If you ...

MK
Answered by Melissa K. Chemistry tutor
46431 Views

What is the Pythagoras Theorem?

The Pythagoras Theorem equation is:

a+ b2 = c2

It is used to calculate an unknown side of a right angled triangle. a, b and c represe...

NB
Answered by Natasha B. Maths tutor
5102 Views

How do I simplify the equation 4x + 5x -2 - 2x + 7?

To simplify an equation the x terms can be collected together to give: 4x + 5x - 2x = 7x

The numbers can be collected together to give: -2 + 7 = 5

Which then when put togeth...

NB
Answered by Natasha B. Maths tutor
6695 Views

How do I know whether to use por or para?

Because these words are both translated to English with 'for' it can be difficult to choose between them at times. In order to choose correctly, there are several rules to remember, here are the most i...

TH
Answered by Tim H. Spanish tutor
5847 Views

What type of movement occurs at a) the hip and b) the knee during the downward phase of a squat?

First, think about the plane of movement that the action is occuring in. During a squat, the body looks the same when you cut it vertically down the middle. The movement is therefore occuring in the sagit...

JW
18398 Views

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