Top answers

How do I calculate the percentage by mass of a metal within an impure substance?

For this question we will look at Sodium Sulphite (Na 2 SO 3 ) and its titration against Potassium Permanganate (KMnO 4 ). This requires acidic conditions. In this example we need to know several things: Tha...
SV
14743 Views

How is skeletal muscle contraction initiated and sustained?

Skeletal muscle contraction consists of two stages. The first is the initiation by the nervous system and the events leading up to myofibril interactions. The second is the actual shortening of sarcomeres, w...
SV
11895 Views

How do you find the nth term formula for a sequence with non-constant difference?

Take the sequence; 9, 12, 19, 30, ... (1) The first step is always to look at difference between the terms; 9, 12, 19, 30, ... +3, +7, +11, ... +4, +4, ... We can see the difference is not constant, (2) so w...
RS
Answered by Richard S. • Maths tutor
211967 Views

Using Context

Appropriate use of context is key in making your essay more two dimensional and mature. Context does not simply mean the historical background behind the text you're studying, but the literary environment an...
AP
5771 Views

What is a separable verb and how is it formed?

In German some verbs are separable . This means that they are formed of two parts which can be separated. Some examples are: an kommen (to arrive), aus gehen (to go out), ein laden (to invite), ab waschen (t...
GH
Answered by George H. • German tutor
4110 Views