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How do you prove that (3^n)-1 is always a multiple of 2?

Proof by Induction: The method of Proof by Induction is a simple but very powerful t...

SA
Answered by Saleem A. Maths tutor
19375 Views

Describe the structure of the cell membrane

The cell membrane is made up of something called the phospholipid bilayer. This is exactly what it sounds like:a hydrophilic phosphate head on the outside and a hydrophobic lipid on the inside. 

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Answered by Thomas W. Biology tutor
5912 Views

Derive the escape velocity from the surface of a planet with radius, r, and mass, M.

This question is about converting kinetic energy into gravitational potential energy. Escape velocity is the speed required to leave the gravitational field of a mass, in this case it's a planet. In o...

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Answered by Thomas R. Physics tutor
20140 Views

When and how to use the imperative

La forme simple de l’impératif    

 

The present imperative is used to give an order or to offer advice.

 

In the imperative mood, th...

EJ
Answered by Eliza J. French tutor
3829 Views

Which has a lower boiling point chlorine or bromine, and why?

Chlorine, as chlorine has fewer electrons shells than bromine. As a result, chlorine is smaller and has a smaller atomic radius

The difference in size, relates to boiling po...

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Answered by Megan F. Chemistry tutor
72444 Views

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