8.1 Electromagnetic radiation has a wave-particle duality. What does this mean? (2) 8.2 Arrange the following types of electromagnetic radiations in order of decreasing wavelength. Infrared, gamma ray, visible light, x-ray (2) 8.3 Define a photon. (2) An electromagnetic wave has a wavelength of 2,5 x 10-9 m. 8.4 Calculate the amount of energy that … Read more
7.1 The diagram below shows different points on a longitudinal wave. 7.1.1 Write down the labels for A, B and C. (3) 7.1.2 Does this type of wave require a medium to propagate? Write down: YES or NO (1) 7.2 The diagram shows TWO sound waves measured for the same time interval. 7.2.1 Which ONE … Read more
6.1 The figure below shows transverse wave motion. The period of the wave is 0,2 s. Calculate the: 6.1.1 Frequency of the wave. (3) 6.1.2 Speed of the wave if distance D equals to 3 metres. (4) Write down: 6.1.3 TWO pairs of points which are in phase. (2) 6.1.4 The amplitude of the wave … Read more
A steel ball of mass 5 kg is rolling over a frictionless surface, as shown below.When the ball reaches point A it has mechanical energy of 490 J. Point B is on the ground. 5.1 State the principle of conservation of mechanical energy in words. (2) 5.2 Use your knowledge of the principle of conservation … Read more
The velocity time graph below represents the motion of a girl riding her bicycle in aneasterly direction on a straight, level road. 4.1 Write down the: 4.1.1 Girl’s initial velocity (2) 4.1.2 Magnitude of the girl’s velocity at t = 300 s (2) 4.2 Use the information from the graph to describe the girl’s motion: … Read more
A van is travelling at a constant speed of 54 km.h-1 in a straight and level roadwhere the speed limit is 40 km.h-1. 3.1 Define the term acceleration. (2) 3.2 Convert 54 km.h-1 to m.s-1. (3) A policeman starts his car from rest just as the van passes him. The police caraccelerates uniformly at 2 … Read more
2.1 A brother and sister walk home from school. After walking 500 m eastward, the brother realises that he has left a book at school and he returns to school. His sister continues walking another 800 m to their home. She arrives home 30 minutes after leaving school. 2.1.1 Define the term average speed. (2) … Read more
Various options are provided as possible answers to the following questions. Choosethe answer and write only the letter (A–D) next to the question numbers (1.1–1.10) inthe ANSWER BOOK, for example 1.11 D. 1.1 Which ONE of the following is a vector quantity? A Force B Time C Speed D Distance (2) 1.2 Which ONE of … Read more