Zeerust Combined School Assignments Grade 12 Learners for June Exams 2021 Question 1 1. Block X has a mass of 4 kg and Block Y has a mass of 2 kg, Block X is placed on a rough table that has a coefficient of static friction of 0.18. Block X and Block Y are joined by a light, inextensible string over a frictionless pulley and Block Z is placed on top of Block X as shown in the diagram below. 2 x y The system, as shown in the diagram, is only just at rest and on the limit of sliding. 1.1 Determine the tension in the rope joining Block X and Block Y while the system is at rest. (2) (2) 1.2 Define a frictional force. 1.3 State the magnitude of the frictional force required for Block X to be at rest. (2) (5) 1.4 Calculate the minimum mass of Block Z to stop Block X from sliding.​

Drag each item into the proper state of matter category.

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?

Use the information presented in the graph to answer the questions. which segments show acceleration? which segment indicates that the object is slowing down? what is the velocity of segment b? what is the acceleration of segment b?