Question

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Answer 1

Answer:

ans 24 a streamlined body is a shape that lowers the friction drag between a fluid, like air and water, and an object moving through that fluid. Drag is a force that slows down motion; friction drag is a special kind of drag

ans 25 The essential characteristicof an executive director ishis or her discharge, usually as an employee, of executive functions in themanagement and administration of the company. Non-executive directors are usually independent of corporate management.

Explanation:

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Answer 2

Questions

1. Determine the pressure when a force of 200N acts on an area of 8m².

2. If you try to hold a glass with oil on your hand, it tends to slip. Why?

3. What is 'stream lined shape'? How is it useful?

4. Differentiate between exhaustible and inexhaustible resources, giving two examples of each.

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Answers

1. Pressure ⇒ Force ÷ Surface Area

Pressure ⇒ 200 ÷ 8

Pressure ⇒ 25

∴ The pressure would be 25 pascal when the force of 200N is acting on an area of 8m².

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2. If you try to hold a glass with oil on your hands, it tends to slip. This is because of friction. When you hold a glass with oil on your hand the friction reduces and tends to slip, this is because oil is a lubricant and it decreases the friction that would occur between the glass and the hands resulting the glass to slip.

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3. A shape where the two ends are smaller than the middle part of the body  is known as a stream lined shape. This objects can travel easily through fluid medium.  Such shape is useful since it cuts against the friction and reduces the friction.

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4. Exhaustible Resources

• These resources takes many years to be formed.
• These resources are also known as non-renewable resources.
• Examples ⇒ Coal and Petroleum.

Inexhaustible Resources

• These resources take lesser time to be formed.
• These resources are also known as renewable resources.
• Examples ⇒ Wind and Solar energy

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