This question refers to the triangle PQR in which angle QPR = 90°, PR = 12 cm and PQ = 5 cm.

The length of QR, in cm, is

A 10 V battery delivers a steady current of 2 A. How long will it be before 1.0 kJ of energy is supplied to the circuit?

The sizes of the interior angles of a polygon are x°, 2x°, 60°, 3x° and 36°. What is the value of x ?

Which of the following would DISCOURAGE emigration?

75 g of freshly dug soil was placed in an oven at 105 ℃ for 24 hours. It was allowed to cool, then reweighed. If the final mass of the dry soil was 66 g, what was the % water content of the original soil sample?

Which one of the following is NOT a receptor in the body?

Vaccination causes a person′s immune system to produce:

The introduction of machines in agriculture results in the unemployment or farm workers.

The type of unemployment these workers suffer is

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

At the cathode all of these can happen EXCEPT for:

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

The range of values of v when 5 - v ≤ 2v - 1 is

In an atom the neutron is found:

Given ƒ : x -> 3x - 1, and g : x -> x², then ƒg(-2) =

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

Which of the following tests describes the test for glucose?

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

Absolute zero is:

The following are all natural materials EXCEPT for:

Instructions: Choose from the four suggested answers the word which is closest to OPPOSITE in meaning to the underlined word.

As a result of the need for trained staff, the firm had to dismiss several workers.