If the magnetic field is weak how is the magnetic force affected

The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?