What is the total displacement covered by a man, in metres if he walked ...

1 km, north; then

200 m south, then a further

3 km, south and finally 

400 m, north?

Choose the correct word or phrase that matches the following statements.

Which of the following sets contains one vector and two scalars?

Consider the diagram below. 

The sum of the vectors is _______

When drawing vector diagrams, the length of the line represents the magnitude of the vector. 

The side of the line with the arrow head is called the tail. 

To make a solution with a concentration of 0,8 mol.dm^-3 MgCl₂ of 600 ml, you will need _____ g of MgCl₂.

Calculate the percentage yield in the following reaction if the theoretical yield of NH₃ is 5,1 g  and the actual yield is 0,1 moles of NH₃. 

N₂ + 3H₂   2NH₃