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4.1 Define the term momentum in words. (2) 4.2 Will the girl-roller-skate combination move TO THE RIGHT or TO THE LEFT after the parcel is thrown?NAME the law in physics that can be used to explain your choice of direction. (2) The total mass of the roller skates is 2 kg. 4.3 Calculate the mass … Read more

In a competition, participants must attempt to throw a ball vertically upwards pastpoint T, marked on a tall vertical pole. Point T is 3,7 m above the ground. Point T may,or may not, be the highest point during the motion of the ball. One participant throws the ball vertically upwards at a velocity of 7,5 … Read more

A block, of mass 8 kg, is placed on a rough horizontal surface. The 8 kg block, which isconnected to a 2 kg block by means of a light inextensible string passing over a lightfrictionless pulley, starts sliding from point A, as shown below. 2.1 State Newton’s Second Law in words. (2) 2.2 Draw a … Read more

1.1 Inertia is the tendency of an object to … A maintain its mass.B continue in a state of non-uniform motion.C remain at rest or in the state of uniform motion.D maintain its velocity when a non-zero net force is acting on it. (2) 1.2 A person stands on a bathroom scale that is fixed … Read more

QUESTION 10 (Start on a new page.) The flow diagram below shows the processes involved in the industrial preparation ofan ammonium fertiliser. 10.1 Write down the NAME or FORMULA of: 10.1.1 Gas X (1) 10.1.2 Gas Y (1) 10.1.3 Acid Q (1) 10.2 Write down the: 10.2.1 TYPE of chemical reaction that converts compound P … Read more

QUESTION 9 (Start on a new page.) Chlorine is produced industrially by the electrolysis of a concentrated sodium chloridesolution, NaCℓ(aq). The balanced equation for the net (overall) cell reaction is as follows: 9.1 Define the term electrolysis. (2) 9.2 For the above reaction, write down the: 9.2.1 Half-reaction that takes place at the cathode (2) … Read more

QUESTION 8 (Start on a new page.) A standard electrochemical cell is set up using two standard half-cells, as shown in thediagram below. 8.1 State the energy conversion that takes place in this cell. (1) 8.2 What is the function of component Q? (1) X is a metal. A voltmeter connected across the cell initially … Read more

QUESTION 7 (Start on a new page.) A hydrogen bromide solution, HBr(aq), reacts with water according to the followingbalanced chemical equation: The Ka value of HBr(aq) at 25 °C is 1 x 109. 7.1 Is hydrogen bromide a STRONG ACID or a WEAK ACID? Give a reason for the answer. (2) 7.2 Write down the … Read more

QUESTION 6 (Start on a new page.) Initially 60,8 g pure carbon dioxide, CO2(g), is reacted with carbon, C(s), in a sealedcontainer of volume 3 dm3. The reaction reaches equilibrium at temperature Taccording to the following balanced equation: 6.1 Define the term chemical equilibrium. (2) 6.2 At equilibrium it is found that the concentration of … Read more

QUESTION 5 (Start on a new page.) The calcium carbonate (CaCO3) in antacid tablets reacts with dilute hydrochloric acid(HCℓ) according to the following balanced equation: 5.1 Is the above reaction EXOTHERMIC or ENDOTHERMIC? Give a reason for the answer. (2) An antacid tablet of mass 2 g is placed in HCℓ(aq). After 30 s the … Read more