DP DT topic 4.1 Materials Properties

Which list is only physical properties of materials?

• Mass, weight, volume, strength

• Thermal Conductivity, hardness, strength, stiffness

• Thermal expansion, volume, density, electrical resistivity

• Density, mass, toughness, plasticity

Which list is only mechanical properties of materials?

• hardness, toughness, plasticity, strength

• stiffness, tensile strength, plasticity, strain

• stress, compressive strength, hardness, electrical resistivity

• mass, weight, density, volume

Youngs modulus, also known as elastic modulus, is used for testing a physical property of materials.

• True

• False

Aesthetic characteristics of materials includes smell and taste.

• True

• False

Photo-chromicity refers to a material that

• changes according to the surrounding temperatute

• changes according to the surrounding light

• moves according to the surrounding temperature

• moves according to the surrounding light

a device that is thermo-electric means that it can

• produce heat from electricity

• produce electricity from heat

Rheostatic fluids are either magnetically or electrically stimulated. What happens when they're stimulated?

• The fluid changes to a gas

• The fluid changes to a solid

• The fluid changes permeability

• The fluid changes viscosity

A shape memory alloy is what?

• a plastic that changes shape with heat.

• a plastic that changes shape with light.

• a metal that changes shape with heat.

• a metal that changes shape with light.

Piezo electricity is created through pressure on a surface.

• True

• False

Torsion is a force. Torsion strength means that a material is capable of what?

• Not being stretched.

• Not being twisted.

• Not being squashed.