AREA, SIZE AND MASS PROFESSIONAL ENGLISH IN USE FOR ENGINEERING

 

PROFESSIONAL ENGLISH IN USE FOR ENGINEERING UNIT 9. AREA, SIZE AND MASS

 

A Area the textbook extract below looks at different aspects of areas B weight, mass, volume and density In everyday language, the term weight means how heavy things are (how much they weigh), and grams and kilograms are used as units of weight. But in physics and in engineering, grams and kilograms are units of mass. Whether an object is on earth – where it is subjected to gravity (the pull of the earth) – or floating of weightless in space, its mass is always the same. The mass of an object depends on:   EXERCISES 9.1 The component below is made of mild steel. It has a radius of 40mm and it is 1.200 mm long. Complete the calculations using the words in the box. Look at A and B opposite to help you. cross-sectional area density mass surface area volume 1. ____________ of mild steel 7.850 kg/m3 9.2 Now write the whole words for the unit of abbreviations in the calculation in 9.1 above. Look at A and B opposite to help you. The first one has been done for you. 1. m    metres 2. mm   ___________ 3. mm2   ___________ 9.3 Complete the extract from an article about satellite design using the words in the box. Look at A and B opposite to help you. cubic gravity lightweight mass square weigh weightless   Satellites need to be designed to cope with two different phases: development (the journey into space by rocket) and the operation (working in space). For the first phase, engineers are faced with the problem that every (1)____________ metre of volume taken up within the rocket will add millions of dollars to its ticket into space. And each extra  gram of (2)____________ added to the craft will increase the fuel needed to

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