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Listen to the text and complete the sentences.

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LISTENING

9. Listen to the text and answer the questions:

1. Where does the conversation take place?

2. What tool is being discussed?

3. Which materials can be used for its different parts?

4. What material is mentioned as expensive?

5. What material is mentioned as one of the hardest?

6. What requirements to the material do the engineers need?

7. Why it is important for the material of a tool to have a good degree of thermal stability?

    

10. Listen to the text and complete the sentences.

1. That’s certainly a scary-looking collection of __________.

2. The latest ones can __________ at over half a million revs per minute.

3. The requirement is abrasion __________, of course.

4. Obviously, they need to be very __________.

5. The last thing, you want is __________ material.

6. Drilling into a tooth at __________ speed, you obviously get a lot of heat build-up.

7. You can actually __________ burning.

 

SPEAKING

11. Work in small groups. Imagine that you are a 1st year student and you have to prepare for an examination in physics. Discuss the differences between the following mechanical properties of materials:

- strength and strain

- strength and resistance

- elasticity and plasticity

- stability and durability

- hardness and toughness.

12. Work in pairs. Discuss the following quotations with your partner.

1. “After a certain high level of technical skill is achieved, science and art tend to coalesce in esthetics, plasticity, and form. The greatest scientists are always artists as well.”

Albert Einstein

2. “Man is unique not because he does science, and he is unique not because he does art, but because science and art equally are expressions of his marvelous plasticity of mind.”

Jacob Bronowski (Mathematician and science writer)

3. “Every man of action has a strong dose of egoism, pride, hardness, and cunning. But all those things will be regarded as high qualities if he can make them the means to achieve great ends.”

Charles de Gaulle

4. “There is only one quality worse than hardness of heart and that is softness of head.”

Theodore Roosevelt

5. “I try not to break the rules but merely to test their elasticity.”

Bill Veeck (American businessman)



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