Ielts Homework

l1. tincture at the list of energy sources and answer the questions below. Wood Wind pee Nuclear Coal Human power Animals Gas Oil a. How has superstar had an impact on human history? b. Which sources do you think control a future? c. What other sources are there? 2. Look at the diagram and answer the questions a and b. a. What does the diagram show? b. What types of words are needed to label the diagram? Make some predictions. 3.Label the diagram victimisation no more than TWO words from the passage below for each(prenominal) blank space. Thomas Newcomens steam engine was one of the root devices to use the power of steam for mechanical work. It was originally used to sum water from mines. A boiler, encased in brick and sitting over a coal fire, generated steam, which drove the piston in the open book binding piston chamber above the boiler. When the steam built up, the pressure opened a pry allowing the steam to fill the piston chamber and push the piston up.When the pisto n reached the top of the cylinder, the first valve was closed and the second valve opened. This second valve sprayed cold water into the cylinder from a cistern, condensing the steam and creating a vacuum. The air pressure from the open-top cylinder pushed the piston down again, thus pulling the rod down with it. The cycle then repeated itself all over again. 4. Decide if the following sentences active machines are true or false. Use a dictionary to dish you. a.Read alsoHomework Solutions Chapter 3A washing machine contains a spirit and motor. b. An air conditioning unit contains a coin and a fan. c. A photocopier has various components, including rollers and a piston. d. A filter and a tube cornerstone be found in a television. e. A lever and a spring are component parts of a toaster. f. A valve and a switch can be found in an aerosol spray. g. inwardly a hoover, there is a filter and rotating brushes. 5. Name one physical object for each of the following components. Batte ry Axle Blade Handle Lens Turbine substitution