2.1 Study the structural formula below. For this compound, write down the:2.1.1 Homologous series to which it belongs (1)2.1.2 IUPAC name (2)2.1.3 IUPAC name of the organic acid used in its preparation (1)2.1.4 STRUCTURAL FORMULA of its straight chain (unbranched) functional isomer (2) 2.2 Write down the structural formula of 4-methylpentan-2-one. (3) 2.3 Consider the … Read more
MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions. 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 D. 1.1 The acceleration due to gravity on Earth is greater than that on the moon.Which ONE of the following … Read more
1.1 The IUPAC name of an organic compound with molecular formula C7H14O2:A HeptanalB Heptan-1-olC Heptan-2-olD Heptanoic acid (2) 1.2 Which ONE of the following structures is the functional group of aldehydes? 1.3 Which ONE of the following equations represents a cracking process? 1.4 The potential energy diagram for a chemical reaction is shown below. I: … Read more
DATA FOR PHYSICAL SCIENCES GRADE 12 PAPER 1 (PHYSICS) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 12 VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES TABLE 2: FORMULAE/TABEL 2: FORMULES MOTION/BEWEGING FORCE/KRAG WORK, ENERGY AND POWER/ARBEID, ENERGIE EN DRYWING WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG ELECTROSTATICS/ELEKTROSTATIKA ELECTRIC CIRCUITS/ELEKTRIESE STROOMBANE ALTERNATING CURRENT/WISSELSTROOM QUESTION 11.2 Hand … Read more
In an experiment to demonstrate the photoelectric effect, light of different wavelengths was shone onto a metal surface of a photoelectric cell. The maximum kinetic energy of the emitted electrons was determined for the various wavelengths and recorded in the table below. 11.1 What is meant by the term photoelectric effect? (2) 11.2 Draw a … Read more
10.1 A teacher demonstrates how current can be obtained using a bar magnet, a coil and a galvanometer. The teacher moves the bar magnet up and down, as shown by the arrow in the diagram below. 10.1.1 Briefly describe how the magnet must be moved in order to obtain a LARGE deflection on the galvanometer. … Read more
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