A solid shape is made by joining three cubes together with the largest cube on the bottom and the smallest on the top. Where the faces of two cubes join,…

19 Two resistors of R1 ohms and R2 ohms are connected in series to a battery which has an e.m.f. of V. Which formula gives the power dissipated by resistor…

18 An impure sample of sodium hydroxide has a mass of 1.20 g. All the sodium hydroxide completely reacts with a minimum of 50.0 cm3 of 0.50 mol dm-3 hydrochloric…

Since Dolly the sheep, many other mammals have also been cloned by somatic cell nuclear transfer. The genetic material from a body cell is inserted into an egg cell that…

Which one of the following pairs do not have the same electronic structure? Answer: 14) A A – CorrectMg has 2 electrons on its outer shell. Each of these electrons…

Which of the following is not needed in order to genetically engineer bacterial cells to produce a fluorescent protein from a jellyfish? Answer: 13) C This might be a tricky…

The square ABCD is positioned so that its vertices are at the points with coordinates: (1, 1), (-1, 1), (-1, -1) and (1, -1). The square is rotated clockwise through…

The diagrams show two glass blocks in air. For the rays of light shown, the critical angle for the glass/air boundary is 42°. A ray of light is shown approaching…