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What is the difference between accuracy and precision?

When we make measurements while doing an experiment, the values we measure always have an uncertainty. We assign an uncertainty based on the equipment we are using and the way we make...

MJ
Answered by Miranda J. Physics tutor
16599 Views

Imperfect or Preterite?

One of the things people find the hardest when learning languages is not forming the tenses but 

LJ
Answered by Lois J. Spanish tutor
4937 Views

Differentiation: How to use the chain rule

If y is a function of u, which itself is a function of x, then 

dy/dx=(dy/du) x (du/dx)

Differentiate the outer function and multiply by the derivative of the inner function.  

...

NH
Answered by Nicolas H. Maths tutor
5730 Views

What is the difference between Sn1 and Sn2 reactions?

Both Sn1 and Sn2 reactions are nucleophilic substitution reactions. Sn1 reactions proceed via 2 steps. An example of this is the substitution of a halogen group such as bromine with an OH- group forming ...

JS
Answered by Joseph S. Chemistry tutor
7453 Views

Convection, conduction and radiation in space

On Earth we notice convection through breathing, conduction through heat and radiation through sunlight. But do we notice these in space? And if not, then why? Let’s make a...

DS
Answered by Daniel S. Physics tutor
14424 Views

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