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

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.

2 / 10

A steel ball bearing is dropped into a fluid and travels 60 cm in 2.53 s. The diameter of the ball bearing is 6 mm and its mass 15.3 g. Calculate the viscosity of the fluid. g=9.81 Nkg-1

3 / 10

Which material is the densest?

4 / 10

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

5 / 10

Which material on the graph above is the weakest?

6 / 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.

7 / 10

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

8 / 10

Estimate k from the graph shown above.

9 / 10

Under a 4 N force, two identical springs, in parallel, stretch 130 mm. Calculate the spring constant for one of the springs.

10 / 10

If the deformation of the material is plastic, the material __________.

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