Quiz 17:

1. Strain is physical quantity

• A. used as measure of the rotational effect of a force.
• B. used as a measure of a forces ability to deform an object
• C. used as a measure of a forces ability to displace an object.
• D. used as a measure of deformation.
• E. used as a measure of the amount of motion an object has.

2. Which of the following statements is correct?

• A. Stress and strain are always inversely proportional
• B. Stress and strain are inversely proportional only on a certain range
• C. Stress s always proportional to the square of strain
• D. Stress and strain are always proptional.
• E. Stress and strain are proportional only on a certain range

3. An aluninum wire has a length of 5 m and a cross-sectional radius of 0.0055 m. Calculate the change in its length when an object of weight 80 N hangs from the wire. (modulus = 7e10 Pa)

• A. 2.112e-5 m
• B. 4.707e-5 m
• C. 3.943e-5 m
• D. 6.013e-5 m
• E. 11.329e-5 m

4. A spherical solid aluminum ball of radius 0.02 m is compressed by a force of 7000 N that is applied perpendicularly through out its entire surface area. Calculate the change in its volume. (modulus = 2.5e10 Pa).

• A. 0.325e-8 m ³
• B. 0.187e-8 m ³
• C. 0.065e-8 m ³
• D. 0.288e-8 m³
• E. 0.097e-8 m ³

5. A 600 N force is acting on a circular surface of radius 0.1 m perpendicularly. Calculate the pressure exerted by the force on the surface.

• A. 19098.593 Pa
• B. 32051.178 Pa
• C. 5184.651 Pa
• D. 11454.512 Pa
• E. 27003.661 Pa

6. Calculte the pressure at a point in an ocean 100 m below the surface of the ocean. (Assume the density of the ocean to be 1000 kg ⁄ m ³ )

• A. 1236307.645 Pa
• B. 2015404.701 Pa
• C. 777171.786 Pa
• D. 1081300 Pa
• E. 401884.716 Pa

7. In an open manometer filled with mercury (densty = 13600 kg ⁄ m ³ ), the level of mercury column in the air side is 0.05 m higher than that in the gas side. Determine the pressure of the gas. Atmospheric pressure is 9.9e4 Pa.

• A. 105664 Pa
• B. 92336 Pa
• C. 7330.4 Pa
• D. 7996.8 Pa
• E. 6664 Pa

8. In an open manometer filled with mercury (densty = 13600 kg ⁄ m ³ ), the level of mercury column in the air side is 0.04 m lower than that in the gas side. Determine the pressure of the gas. Atmospheric pressure is 9.7e4 Pa.

• A. 102331.2 Pa
• B. 91668.8 Pa
• C. 5331.2 Pa
• D. 4798.08 Pa
• E. 6397.44 Pa

9. In a closed manometer filled with mercury (densty = 13600 kg ⁄ m ³ ), the level of mercury column in the vacuum side is 0.03 m higher than that in the gas side. Determine the pressure of the gas. Atmospheric pressure is 9.7e4 Pa.

• A. 3198.72 Pa
• B. 93001.6 Pa
• C. 3598.56 Pa
• D. 100998.4 Pa
• E. 3998.4 Pa

10. To what height would a mercury (density = 13600 kg ⁄ m ³ ).barometer rise at a place where atmospheric pressure is 7.5e4 Pa?

• A. 0.125 m
• B. 0.97 m
• C. 0.39 m
• D. 0.214 m
• E. 0.563 m