Will mark ! which of the crystalline solids are good conductors of heat and electricity? [select all that apply] [ ] ionic solids (if dissolved) [ ] molecular solids [ ] metallic solids [ ] ionic solids (if molten) [ ] covalent network solids [ ] atomic solids

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost