1) Density is measured in kilograms per cubic meter.
2) Most materials have a higher density than water and sink in water.
3) The density of the material is very important, especially in aviation.
4) Young's modulus is the ratio of the applied force to the elastic deformation of a given material.
5) The more rigid the metal, the less it deforms under load.
6) when the metal is stretched, it first flows, that is, it is plastically deformed.
7) Lead, copper, aluminum and gold are the most malleable metals.
8) Creep resistance is a very important property of materials used in aircraft engines.
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РЕБЯТ !Put the verbs in brackets into the correct tense.Dear Jess, How are you? I'm sorry 1.not/write) to you for a while, but I2)...(be) really busy. Let me tell you my news.I 3)...(start) at the local 6th form college last September, and I 4)...(study) for my A' levels at the moment. I 5)...(become) a lawyer when I grow up, so I'll have to work hard and pass all my exams to get into a good university.My other news is that I have a new pet dog. l 6)...(have) him for two months nowand he's really cute but sometimes a little naughty. For example, while I 7)...(walk) himin the park yesterday, he 8)...(run) off and it 9)...(take)me an hour and a half to find him again.Anyway, I must go as I have some homework to do, but I promise 10...(write) again soon.Love, Poppy
1 haven't written (не написал)
2 have been (был)
3 started (начал)
4 am studying (изучаю)
5 am going to become (собираюсь стать)
6 have had (имел)
7 was walking (гулял)
8 ran (бежал)
9 took (брал)
10 will write (напишу)