What would happen if the igneous rock sample was first exposed to energy from the Sun and then millions of years later to energy from the Earth's interior

Which statement can best be concluded from the ideal gas law?

The number at the end of an isotope’s name is the number.

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