Materials Random Retrieval

1

Materials Random Retrieval

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

1 / 10

When a ball bearing is dropped through a liquid of unknown viscosity, the sum of all the forces equal ___________.

2 / 10

What conditions are required for Stokes's law to apply?

3 / 10

A 4.2 g balloon is inflated with 1.8 g of air until it is 1.4x10-3 m3 in volume. Calculate the density of the inflated balloon.

4 / 10

Stress and strain are used to calculate the Young's modulus of a material up to its _____________.

5 / 10

The Young's Modulus for a single walled carbon fibre nanotubes of diameter 4 nm is 1000 GPa. If it is placed under 75% strain, what force is required to break it?

6 / 10

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

7 / 10

Select the graph with the correct labels.

8 / 10

The graph above shows a fishing wire being extended by adding masses. Use the graph to estimate the elastic strain energy of the material.

9 / 10

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

10 / 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.

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