3 Unit 3: Working with machines


The power of physics A basic law of physics helps us every day of our lives.


a b c


A Study the photographs. 1. What is the name of each item? 2. What do you use each item for? 3. Why do you need each item? 4. What is the connection between the items?


B 040


Listen to Part 1 of the radio programme. 1. Complete the programme information.


9:30 p.m. – Science at work Professor Adamo Berrios of Hadfield University looks at the connection between a and a


, a . 2. Check your answers to Exercise A4.


3. Write the words in the correct order to make a sentence from the introduction.


into / mechanical / work / a machine / energy / turns


C 041 Listen to Part 2. 1. Complete the sentences.


a. Sometimes people don’t have enough .


b. They need simple


2. Complete the law. a small


= a large 36 .


c. Simple machines use a basic law of .


x a large Listening skill: Recognizing and using examples


Speakers often give examples. Examples help you to understand the points.


Listen for these words and phrases: for example, such as, like, including.


Make a note of examples. After the talk, try to add more examples of your own.


Pronunciation: Saying schwa (1)


Many words in English with two or more syllables have the schwa \´\ sound. Unstressed vowels often have this sound. All the fi nal syllables below have the schwa \´\ sound:


lever spanner boiler power motor centimetre


picture pressure


D How do the items in the photographs use the basic law of physics?


Pronunciation: Spelling ≠ sound Do the mini quiz!


1. The i in simple is like the i in ... a. machine b. distance


2. The sound of gh in right is like gh in ... a. tight


b. enough


3. The sound of ti in connection is like the ti in ... a. practice b. definition


042 Listen, check and repeat.


Sometimes the spelling does not help with the pronunciation. For new words, try to fi nd words with similar sounds, e.g., law – saw.


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