The letters A to D in the table below represent four organic compounds. Use the information in the table to answer the questions that follow. 2.1 Write down the: 2.1.1 Letter that represents a ketone (1) 2.1.2 Structural formula of the functional group of compound C (1)Â 2.1.3 General formula of the homologous series to … Read more
Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Choose the answer and write only the letter (A–D) next to the question number (1.1–1.10) in the ANSWER BOOK, for example 1.11 E. 1.1 Which ONE of the following pairs of reactants is used in a reaction during … Read more
11.1 The circuit below is used to determine the resistance of resistor X. The 12 V battery has negligible internal resistance. When switch S is closed,the reading on the ammeter is 0,5 A. 11.1.1 State Ohm’s law in words. (2) 11.1.2 Calculate the resistance of resistor X. (5) 11.2 Study the circuit below. The battery … Read more
10.1 The arrangement of apparatus to demonstrate Faraday’s law ofelectromagnetic induction is shown below. 10.1.1 State Faraday’s law of electromagnetic induction in words. (2) 10.1.2 State TWO ways in which the deflection on the galvanometer can beincreased. (2) 10.2 A coil with area 0,6 m2 is held with its axis coinciding with the direction of … Read more
9.1 Two identical metal spheres, P and Q, separated by a distance d, aresuspended from an insulated rigid wooden bar, as shown in the diagrambelow. The charge on the spheres are –4 μC and +8 μC respectively. 9.1.1 Sphere Q experiences an electrostatic force. In which direction will sphere Q move? Write down only TO … Read more
8.1 All types of waves undergo diffraction. 8.1.1 Define the term diffraction. (2) 8.1.2 State the condition necessary for diffraction to occur in a single slit. (2) 8.2 Light of wavelength 460 nm passes through a single slit of width 7 x 10-6 m.A diffraction pattern is observed on a screen, as shown in the … Read more
The diagram below shows a light ray travelling through an optical fibre. The fibre ismade from two different glass materials known as the core glass and the outercladding glass. These two types of glass materials have different refractive indices. 7.1 State the TWO conditions necessary for total internal reflection to occur. (4) 7.2 Which part … Read more
The table below shows accurate values for the refractive indices (relative to air) ofsome optical media obtained during refraction experiments. The optical densities of themedia increase from water to diamond. 6.1 What important deduction about the relationship between a medium and itsrefractive index can be made from the information above?(2) 6.2 Define the term refraction.(2) … Read more
Gravitational force exists between the sun and the Earth. 5.1 State Newton’s law of Universal Gravitation in words. (2) 5.2 The mass of the sun is 330 000 times greater than that of the Earth. Thedistance between the centres of the sun and the Earth is 1,38 x 109 m.Calculate the gravitational force that the … Read more