Given thatܽ a=3/5+X, b= 3+X/5 and c=3+X/5+Xwhereܺ is a whole number greater than zero, whichone of the following is true? Answer: 12) B Since 6 out of the 7 options…

Below are three statements about radioactivity or nuclear energy.1 Neutrons emitted in nuclear fission can cause further fission.2 The half-life of a radioactive substance is half the time taken for…

Which of the following statements about the alkali metal rubidium is correct? Answer: 10) D Firstly, alkali metals are the elements in group 1 of the periodic table. A –…

The diagram shows the results of a breeding experiment using a homozygous black mouse and a white mouse. Mouse 1 was then allowed to mate with mouse 2. Using C…

PQR is an isosceles triangle in which PQ=PR=6cm and QR =8cm. What is the value of the tangent of angleܴܳܲ ? Answer: 8) E Divide the isosceles triangle into two…

A 100% efficient step-down transformer decreases the voltage of an alternating current (a.c.) electricity supply. What effect does this step-down transformer have on the mean power transferred and the alternating…

The diagram shows the suggested changes in energy labelled as a, b, c, d and e, during a chemical change from reactants to products. Which value is the correct energy…

Which row identifies what is occurring during anaerobic respiration in animal cells? Answer: 5) A The respiration is ANAEROBIC, meaning no oxygen is used.Carbon dioxide is only formed in aerobic…

A bag contains only 8 beads. The beads are identical in all respects except colour. 3 of the beads are black and the other 5 beads are white. A bead…

The colour of the surface of an object has an effect on the rate of infrared radiation that it absorbs and emits. As a result of this, some clothes which…