Two learners investigate the effect of the slit width on the degree of diffraction. They use a green light with a wavelength 520 nm. They set up an experiment, as shown below, and measure the position of the first dark line from the centre of the bright, central band when changing the slit width. The … Read more
Olive oil floats on water because its density is less than the density of water. However, the refractive index of olive oil is 1,47 while the refractive index of water is 1,33. 6.1 Define the term refractive index. (2) 6.2 Calculate the speed of light through olive oil. (3) 6.3 If light travels through water … Read more
Two satellites orbiting the Earth are situated on opposite sides of the Earth. Satellite A has a mass of 3 800 kg and Satellite B has a mass of 4 500 kg. Satellite A is at a height of 25 000 km above the surface of the Earth. 5.1 State Newton’s Universal Gravitational Law in … Read more
Two blocks, of mass 8 kg and 4 kg respectively, are joined with an inelastic string of negligible mass. The string runs over a frictionless pulley. The 8 kg block is on a horizontal surface while the 4 kg block is on an inclined plane of 40° with the horizontal. The coefficient of kinetic friction … Read more
A hovering rescue helicopter has a container of supplies, with a weight of 1 960 N, hanging from a cable. The tension in the cable is 2 100 N. 3.1 State Newton’s First Law of Motion in words. (2) 3.2 Draw a labelled force-diagram of ALL the forces acting on the container. (3) 3.3 Why … Read more
A heavy object is lifted using two ropes and two pulleys, as shown in the diagram below. The two pulleys are a distance x apart. The force FA, in rope A, is 730 N and the force FB, in rope B, is 1 440 N. Rope A makes an angle of 70° with the horizontal … 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
GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 10VRAESTEL 2 (CHEMIE) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES
Study the water cycle below and answer the questions that follow. 9.1 The water cycle consists of many processes.Identify the following processes: 9.1.1 A (1) 9.1.2 B (1) 9.1.3 E (1) 9.2 Is energy ABSORBED or RELEASED during condensation? Give a reason forthe answer. (2) 9.3 Give ONE reason why water vapour is referred to … Read more