Which one of the following statements about diffraction is true?

The table shows the distribution of the ages of 25 students.

What is the probability that a student chosen at random is AT LEAST 13 years old?

When a person who has diabetes injects himself with insulin it:

Some foods contain flavour enhancers. These food additives:

If US$1.00 is equivalent to EC$2.68, how much in US$ would one get for EC$100?

In which one of the following four cases would the pressure be greatest?

A collection of several tissues which carry out a particular function is called:

The halogen used to make bleach is called:

If closing stock Were overstated by $1,000 at the end of a trading period, the error would result in an

Arrange the following secondary storage devices in order of increasing capacity from smallest to largest: a 1GB memory card, CD-ROM, DVD and a 128 MB flash drive.

The energy used in thermal decomposition is:

A man and woman plan to start a family. Which of the following is likely to be LEAST important to them?

__________ is a type of chip from which data can be erased by exposure to ultraviolet light.

Removal of forests may cause all of the following EXCEPT

The decimal equivalent of ⁷/₈ is

When a metal wire carries an electric current, charges flow through it.The moving charges are:

Enzymes catalyse specific reactions by having an active site where the substrate fits.This theory is called:

The monomer used to make poly (propene) is called:

Which of the following relations is represented by the graph shown above?