When numbers are very small or very large, it is convenient to either express the value in scientific notation and/or by using a prefix with the unit. a pain-relieving pill has a mass of 0.005 g. express the pill’s mass in grams using scientific notation or in milligrams. express your answer in scientific notation to one significant figure or use a prefix on the unit.

5 mg,

Explanation:

First of all, let's rewrite the mass in grams using scientific notation.

we have:

m = 0.005 g

To rewrite it in scientific notation, we must count by how many digits we have to move the dot on the right - in this case three. So in scientific notation is

If  we want to convert into milligrams, we must remind that

1 g = 1000 mg

So we can use the proportion

and we find

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.