Compare the mineral halite (NaCl, hardness of 2.5) to diamond, which is pure carbon chemically bonded to itself in a network. Are the mineral's chemical bonds covalent,
polar covalent, or ionic? Which mineral is harder?

The consumption of fossil fuels could be

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

What is the magnitude of the resultant vector round your answer to the nearest tenth