The units we use for heat given out by a reaction are:

Compared to industrialised countries, developing countries:

Sweating can help to cool the body. This cooling is achieved mainly by:

A certain nucleus has 12 protons and 16 neutrons.Which one of the following statements about the nucleus is NOT true?

Which one of the following is NOT a magnetic material?

A shopkeeper buys 24 CD players for a wholesale price of $1800. At what price per CD player must she sell to make a profit of 10% on her cost?

The Item refer to the information below The following scores were obtained by eleven footballers in a goal-shoot competition:

The median score was

The exterior angles and the interior angles of a polygon are equal. How many sides does the polygon have?

In a simple reflex action:

in which of the following accounts is debenture interest charged as an expense?

Which of the following can cross the placenta from mother to fetus?

In the Venn diagram above, the shaded portion represents

Osmosis is:

The group of elements whose molecules and atoms are the same is called:

1 mole of gas occupies 24 litres at room temperature and pressure, so the number of moles in
72 litres is:

Which one of the following taxonomic groups contains the greatest number of organisms?

The pie chart above shows how a student used 10 hours per week for studying English (E), Mathematics (M), French (F) and Geography (G), The amount of hours spent studying French is approximately

Cooking food improves all of these EXCEPT for:

A home computer system is equipped with a memory card reader, floppy disk drive, a DVD drive and an internal hard disk, The LEAST an MOST portable media that can be used with this computer are __________.

To work out the heat change in a reaction we need to know just three things, the mass, the temperature change and the: