The concept of the of distance is illustrated by the fact that as cost increases with distance, interactions between people decrease.
a. relativity
b. flexibility
c. erosion
d. friction

The two required components for a generator are

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

Ahypothetical metal has an orthorhombic unit cell for which the a, b, and c lattice parameters are 0.413 nm, 0.665 nm, and 0.876 nm, respectively. (a) if there are 8 atoms per unit cell and the atomic packing factor is 0.536, determine the atomic radius (in nm). (b) if the density is 3.99 g/cm3, calculate the metal's atomic weight (in g/mol).