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

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

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

3 / 10

A unknown material under load 75 N incurs an extension of 2.1 mm. The original length of the material was 1.75 m and it has a diameter of 0.45 mm. Which material is it most likely to be?

4 / 10

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

5 / 10

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

6 / 10

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

7 / 10

A wire has a diameter of d and a when a force of F is applied, it breaks at σ. What would the value of σ be if the diameter was halved?

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

What is another term for tensile deformation?

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