devozeeba A battery with an internal resistance of 1 Ω and an unknown emf (ε) is connected in a circuit, as shown below. A high-resistance voltmeter (V) is connected across the battery. A1 and A2 represent ammeters of negligible resistance. With switch S closed, the current passing through the 8 Ω resistor is 0,5 A. 9.1 … Read more
Two charged particles, Q1 and Q2, are placed 0,4 m apart along a straight line. The charge on Q1 is + 2 x 10-5 C, and the charge on Q2 is – 8 x 10-6 C. Point X is 0,25 m east of Q1, as shown in the diagram below. Calculate the: 8.1 Net electric … Read more
A very small graphite-coated sphere P is rubbed with a cloth. It is found that the sphere acquires a charge of + 0,5 μC. 7.1 Calculate the number of electrons removed from sphere P during the charging process. (3) Now the charged sphere P is suspended from a light, inextensible string. Another sphere, R, with … Read more
6.1 The data below was obtained during an investigation into the relationship between the different velocities of a moving sound source and the frequencies detected by a stationary listener for each velocity. The effect of wind was ignored in this investigation. 6.1.1 Write down the dependent variable for this investigation. (1) 6.1.2 State the Doppler … Read more
The track for a motorbike race consists of a straight, horizontal section that is 800 m long. A participant, such as the one in the picture above, rides at a certain average speed and completes the 800 m course in 75 s. To maintain this speed, a constant driving force of 240 N acts on … Read more
SECTION C: SHORT STORIES In this section there are questions set on the following short stories: • ‘THE LUNCHEON’ by W Somerset Maugham• ‘RELATIVES’ by Chris van Wyk QUESTION 6 Read the extracts from the TWO short stories below and answer the questions set on each. The number of marks allocated to each question serves … Read more
QUESTION 5: NOTHING BUT THE TRUTH Read the extracts from the play below and answer the set questions. The number of marks allocated to each question serves as a guide to the expected length of your answer. NOTE: Answer the questions set on BOTH extracts, i.e. QUESTION 5.1 AND QUESTION 5.2. 5.1 EXTRACT I [Sipho … Read more
A bullet of mass 20 g is fired from a stationary rifle of mass 3 kg. Assume that thebullet moves horizontally. Immediately after firing, the rifle recoils (moves back) with avelocity of 1,4 m∙s-1. 4.1 Calculate the speed at which the bullet leaves the rifle. (4) The bullet strikes a stationary 5 kg wooden block … Read more
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
Ball A is projected vertically upwards at a velocity of 16 m∙s-1 from the ground. Ignore the effects of air resistance. Use the ground as zero reference. 3.1 Calculate the time taken by ball A to return to the ground. (4) 3.2 Sketch a velocity-time graph for ball A. Show the following on the graph: … Read more