devozeeba (2) 2.1 Define the term covalent bond. 2.2 Draw Lewis structures for: 2.2.1 CH3Cℓ (2) 2.2.2 CO2 (2) 2.3 How many lone-pair electrons are on the central atom in the CO2 molecule? (1) 2.4 Identify ONE of the substances in Reaction 2 that can form a dative covalentbond when reacting with an acid. (1) 2.5 … Read more
9.1 A survey was done among 80 learners on their favourite sport The results are shown below : 52 learners like rugby (R) 42 learners like volleyball(V) 5 learners like chess (C) 14 learners like rugby and volleyball but not chess 12 learners like rugby and chess but not volleyball 15 learners like volleyball and … Read more
8.1 A bag contains 3 blue marbles and 2 red marbles. A marble is taken from the bag the colour is recorded and the marble is put aside. A second marble is taken from the bag the colour is recorded and then put aside 8.1.1 Draw tree diagram to represent the information above. Show the … 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 Four forces act on a point, as indicated in the diagram. The magnitudes … Read more
7.1 A company bought machinery costing R80 000. Using the reduced balance method the machinery had a book value of R20 000 after 5 years. Calculate the rate of depreciation. (3) 7.2 Calculate the effective interest rate if interest is compounded at 5% p.a., compounded quarterly (3) 7.3 Sipho invested R30 000 for 6 years. … Read more
10.1 The circuit below consists of a 6 Ω and 15 Ω resistor connected in parallel and an unknown resistor R, in series. An ammeter, a high-resistance voltmeter, a closed switch and battery are connected, as shown. The resistance of the battery and wires can be ignored. The total power dissipated in the parallel part … Read more
An induction coil of area 48,6 cm2 and 200 windings is rotated clockwise in a constant magnetic field of magnitude 2,4 T. Refer to the diagram below. The graph below shows how the induced emf varies with the inverse of time. 9.1 State Faraday’s law in words. (2) 9.2 Use the information in the graph … Read more
Two IDENTICAL point charges, X and Y, are placed 2 mm apart. Point P is 3 mm to the right of charge Y. The net electric field at point P is 5,44 × 106 N∙C-1 to the left. 8.1 Define the term electric field at a point. (2) 8.2 Are the charges NEGATIVE or POSITIVE? … Read more