Which one of the following statements about diffraction is true?

All of these materials are used in a blast furnace EXCEPT for:

The equation of the line which passes through the point (0, 2) and has a gradient of ¹/₃ is

John Jones pays his employees by cash. How will he record this payment in his books?

Which of the following characteristics MUST ALL formal groups possess?

1. Membership requirements
2. Code of conduct
3. Specific objectives
4. Elected leaders

All of the following are general purpose software EXCEPT __________.

The workplace should be:

In an airport, a system consisting of sensors, bar code readers and remote controls is MOST LIKELY used for __________.

Which of the following are examples of environmental variation in humans?
Ⅰ hair colour
Ⅱ height
Ⅲ intelligence
Ⅳ body mass

A plastic that softens every time it is heated is said to be:

Potassium reacts quickly with water but we do not use it with acids because:

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

Which of the following items is not a component of a graphical user interface?

Banks and other financial institutions utilize __________ technology that automatically verifies the identity of callers wishing to access their accounts.

The part of the brain that processes information from the sense organs is the:

In which of the following countries is proportional representation practised?

The alcohol in beer and spirits is called:

We do not see an object if rays of light from it are focussed on the blind spot because:

The alkane compound with seven carbon atoms is:

The perimeter of a rectangle is 26 cm. The rectangle is converted to a square by tripling the width and taking a quarter of the length. What is the perimeter of the resulting square?