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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
19790 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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TW
Answered by Thomas W. Biology tutor
6215 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...

TR
Answered by Thomas R. Physics tutor
22089 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...

MF
Answered by Megan F. Chemistry tutor
74400 Views

How is a message transferred across a synapse?

A synapse is a junction between the end of one neuron (known as the pre-synaptic neuron) and either another neuron (known as the post-synaptic neuron) or...

MB
Answered by Max B. Biology tutor
13089 Views

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