Materials Random Retrieval

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Materials Random Retrieval

This quiz contains all the questions in the Materials section. The website will pick 10 questions at random.

1 / 10

A ball bearing of diameter 5.6 mm is dropped into a liquid which has a viscosity of 5.4 Pa s and a density of 1.38 kgL-1. In the liquid, it reaches a terminal velocity of 0.023 ms-1. Calculate the mass of the ball bearing. g=9.81 Nkg-1

2 / 10

HMS Astute is a nuclear-powered submarine in service with the Royal Navy, she can dive to depth of 300 m in seawater of density 1024 kgm-3. If the pressure inside the submarine is kept at sea level (1.01x105 Pa), calculate the resultant force on a section of the hull of area 20 m2 at her maximum depth.

3 / 10

When the temperature increases, what is the effect on fluids' viscosities?

4 / 10

Which diagram is showing laminar flow?

5 / 10

Which material is the densest?

6 / 10

What is the units for Young's modulus in terms of SI units?

7 / 10

A copper wire has a length of 25 cm and a force of 400 N is applied to the wire, which causes it to stretch to 28.9 cm. Calculate the elastic strain energy stored in the wire.

8 / 10

A wire has a diameter of 0.5 mm and a breaking stress of the wire is 7.4x1010 Nm-2. Calculate the mass that would break the wire. g = 9.81 ms-2

9 / 10

Two nichrome wires, A and B, have a load of 30 N placed on them each. The original lengths of the wires are 3 m and 2 m. Each wire shows the same extension. Find the ratio of Ak to Bk.

10 / 10

A meteor traveling through space has a k = 4.2x106 Nm-1 and a force of 5x108 N. Calculate the extension of the meteor.

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