Azurite is a mineral made up of a mixture of CuCO3 and Cu(OH) 2. Which one of the following is a possible formula of azurite? Answer: 14) F By looking…

The diagrams show, not to scale, three different situations in which a force F acts. Also shown in each case is a distance d.Diagram 1:Person sitting on a chairDiagram 2:Wheelbarrow…

Inorganic builders are put into detergents to act as a buffer, i.e. to keep the pH close to 7. Sodium tripolyphosphate is a major one used. The equation for its…

In one type of neurological disease, neurons are unable to detect a certain stimulus which would normally cause pain. In a patient with this disease, which of the following would…

A formula which connects the 'going', G, with the 'rise', R, of stairs in a staircase is below:G = 5 + √7 (9 – R)² + 9Rearrange the formula to…

Students investigate a radioactive source. They place a detector close to a radioactive source and take 5 readings over 5 minutes. They then place a thin sheet of paper between…

The diagram represents the molecule lecithin, a chemical that is added to chocolate drinks to prevent the oils separating out from water. Which row of the table below correctly identifies…