PYP 001 SECOND MAJOR EXAM CODE TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 1
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1 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 1 *Read the following (20) questions and choose the best answer: (The Periodic Table is attached) 1 Car P has twice the speed of car Q but car Q has four times the mass of car P. Which statement is correct? A) The two cars have the same kinetic energy. B) Car P has half the kinetic energy of car Q. C) Car P has one quarter of the kinetic energy of car Q. D) Car P has twice the kinetic energy of car Q. 2 A water pump lifts 9.00 kg of water through a vertical height of 3.50 m in 1.00 minute. What is the power of the pump? A) 5.15 W B) W C) 309 W D) 3.15 W
2 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 2 3 The diagram shows a child on a swing. The mass of the child is 35 kg. The child is raised to point A and then released. She swings downwards through point B. Assuming that air resistance is negligible, calculate the speed of the child as she passes through the equilibrium position B. A) 3.7 m/s B) 5.4 m/s C) 13.7 m/s D) 1.18 m/s
3 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 3 4 The crane shown in the figure below lifts its 500 N load to the top of the building from A to B. Distances are shown on the diagram. How much work is done by the crane? A) 20,000 J B) 25,000 J C) 15,000 J D) 35,000 J 5 The electric motor of an elevator uses 630 kj of electrical energy when raising the elevator and passengers, of total weight N, through a vertical height of 29 m. What is the efficiency of the elevator? A) 57.5 % B) 100% C) 1.74% D) 19.8%
4 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 4 6 Which of the following changes of state can be identified as only evaporation? A) A shallow pond dries up in the summer. B) At 100 ºC, the water in a pan changes to steam. C) Dry ice in an ice-cream cart disappears. D) Snow on the ground turns to liquid water. 7 In which case the average kinetic energy of water molecules is larger: a swimming pool of boiling water or a cup of boiling water? A) The average kinetic energy of molecules in each is the same. B) The swimming pool because the molecules make more collisions. C) The swimming pool because more bubbles are formed in the pool. D) The cup because the molecules hit the cup s inner surface more often. 8 To what Celsius temperature must a gas sample (initially at 20ºC) be heated if its volume to double while its pressure remains constant? A) 313ºC B) 40ºC C) 273ºC D) 586ºC 9 If a 0.98-N buoyant force acts on a wooden block while it is submerged in water, what would be the mass of the displaced water? A) kg B) 0.98 kg C) 9.8 kg D) 10 kg
5 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 5 10 A hydraulic lift is used to lift a heavy box that is pushing down on a 5.0-m 2 piston with a force of 2,000 N. What force needs to be exerted on a 0.05-m 2 piston to lift the box? A) 20 N B) 2,000 N C) 200,000 N D) 500 N 11 Which of the following statements is NOT correct? A) When the flow of a fluid is restricted its speed decreases and its pressure increases. B) The pressure of a gas is inversely proportional to the volume of its container at constant temperature. C) Water expands as it cools from about 4ºC to 0ºC. D) The Sun is in plasma state. 12 Rust (Fe 2 O 3 ) is a. A) Pure substance B) homogeneous mixture C) heterogeneous mixture D) Physical Change. 13 Clouds in the sky are examples of a. A) colloid. B) suspension. C) homogeneous mixture. D) pure substance.
6 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 6 14 Which of the following physical properties is used in the distillation of crude oil? A) Boiling point. B) Color. C) Viscosity. D) Density. 15 Which of the following statements is correct? A) Formation of a solid precipitate when two liquids are mixed together is a sign that a chemical change has occurred. B) In any chemical change, the total mass of the products must be less than the total mass of the reactants. C) Sublimation is a chemical change. D) Ability to rust is a physical property of iron. 16 (I) and (II) are diagrams of two nuclei, where P stands for proton and N stands for neutron, which of the following is TRUE? A) (I) and (II) are isotopes of helium. B) (I) and (II) are isotopes of different elements. C) (I) and (II) have the same atomic mass. D) (I) and (II) have different atomic numbers.
7 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 7 17 In Bohr s atomic model, electrons are located A) in fixed orbits around the nucleus. B) at fixed points around the nucleus. C) in the electron cloud. D) inside the nucleus. 18 Which of the following elements has properties that are similar to Beryllium (Be)? A) Calcium. B) Scandium. C) Lithium. D) Potassium. 19 An element is found in another galaxy exists as two isotopes. If 80% of the atoms have an atomic mass of amu and the other 20% have an atomic mass amu, what is the approximate atomic mass of the element? A) 80.4 amu B) 64.0 amu C) 81.0 amu D) 81.6 amu
8 TERM 161 THURSDAY, DECEMBER 15, 2016 PAGE 8 20 Which of the following is the correct electron dot diagram for sodium chloride (NaCl)? A) B) C) D)
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