Answer the following questions. Question 1 Centrifuge is a device that widely used in laboratory to...

Answer the following questions.

Question 1

Centrifuge is a device that widely used in laboratory to separates particles from a solution. (a) Based on your knowledge about circular motion, briefly explain the working principle of the centrifuge on these separation process.

(b) State two types of centrifuge. Describe their specification and functions.

Question 2

(a) An object with a mass of 0.5 kg is put into a liquid which fill up in a container. In this process, the liquid displaced by 15.0 cm³. The density of the liquid is 900 kg m^-3.

Will this object sink or float? Explain your answer.
If your answer is sink, without adding any extra material, how would you make the object to float? If your answer is float, without adding any extra material, how would you make the object to sink?

(b) Explain brittle materials and plastic materials by using stress and strain.

Question 3

There are many phenomena and devices existed based on ideal gas law. With pressure, volume and temperature, briefly explain two examples which are related with ideal gas law.
You have a big piece of raw potato and you want to make it into mashed potato. With the conditions that you need to prepare it fast, boiling this whole piece of potato in water is not your option.

By using the knowledge that you learn about thermal properties of a matter, what would you do to reduce your cooking time? Elaborate your steps and explain why you want to do so.

Expert Solution

genius_generous answered 2 years ago

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