In triangle PRS, line QT is parallel to side RS.RS = 1.5 cmTS = 1.8 cmQT = 0.3 cmWhat is the length of PS? Answer: 12) F To solve this…

A piece of magnesium ribbon is dropped into a beaker of dilute aqueous hydrochloric acid at room temperature. After a while the production of bubbles of gas slows down. Which…

The diagram shows four experiments used to investigate movement of substances across dialysis tubing. This tubing is a partially permeable membrane which allows both glucose and water to pass through…

In a group of 20 patients at a medical centre, 5 suffered from migraines. Two patients from the group of 20 were picked at random for a survey on the…

A puddle is left on a road after a rain shower. The water in the puddle slowly disappears by evaporation. Three statements about the effect of changing different conditions on…

Which of the following atoms and ions contain(s) 20 neutrons and 18 electrons? 1 –23416 S2 –lC37173 Ar40184 +K39195 Ca Answer: 6) D Remember mass number = no. of protons…

SCID is an inherited condition in humans. People with some types of SCID are unable to make a functional enzyme necessary for the production of healthy white blood cells. A…

Which one of the following is equivalent to (√5 – 2)²? Answer: 4) F (√5 – 2)²Using the (a – b)² = (a² + b² – 2ab) rule, (√5)² +…

Below are four statements about electromagnetic waves.1 Microwaves have a smaller wavelength than visible light.2 The speed of visible light in a vacuum is higher than the speed of other…