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

When undertaking practical work to measure the viscosity of liquid, why should the marker the signifies timer start be approximately halfway down the tube?

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

A copper wire of diameter 0.6 mm, X, is joined in series to the end of another copper wire of diameter 0.125 mm, Y. Both wires are 80 cm in length when no load is applied. A 15 N load is hung on the end of the wires as shown in the diagram below. If the Young's Modulus of copper is 128 GPa, calculate the extension for each wire.

4 / 10

When investigating Young's modulus, why should you use a long wire?

5 / 10

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

6 / 10

Which material on the graph above is the stiffest?

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

This graph shows the extension of 4 different springs, which spring is the stiffest?

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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