Subject: Science, Physics, Not General Physics. Topic: Pressure. Would you mind helping me answer these questions and also more question from number 14? Thank you for your help. More Question: Hovercraft: 14 a) What is used to collect the air under a hovercraft? b) What prevents the air escaping? c) What makes the hovercraft rise?

. CHAPTER 14 PRESSURE . Pressure in liquids b) Name two uses of hydraulic systems. 9 A beaker contains a liquid. State two places where the liquid exerts a pressure. 10 The picture shows three jets of water flowing from a can. Pressure in gases 12 A teacher is demonstrating the strength of the air pressure by using a steam can. Here are the events that occur in the demonstration but they are arranged in the wrong order. Arrange them correctly by writing the letter of each statement in the order in which it occurs. A The top is put on the can. The can is crushed. C A small amount of water is poured into a can. D Steam comes out of the can. The quantity and pressure of the air inside the can is reduced. The can is heated. G Condensation of steam occurs inside the can. a) When will jet A stop flowing? H The heat is switched off. b) As the water level falls, what happens to the middle jet of water? Tick () the correct box. It stays the same. 13 a) Why does the gas shoot out of an aerosol when its nozzle is opened? It rises and becomes more horizontal. It sinks and becomes more vertical. An aerosol can has strong sides that keep their shape when the can is full. b) (i) What would happen if the sides were weak? 11 a) What is hydraulic equipment used for? Tick () the correct box. Transmitting liquids from one place to another Transmitting pressure from one place to another (ii) Explain your answer. Transmitting pressure in all directions Transmitting pressure from one liquid to another 78 79