Answer:
The answer to the very last one is: Boyle's law. Pressure and volume are inversely proportional as the new variable changes from the known. Pressure doubled equals 1/2 of original volume, assuming temperature remains the same. So 40.0 mL is the new volume as it is compressed.
When you talk about "the strength of an electric force" in middle school, I'm pretty sure you're talking about the force between two electrostatic charges that either pulls them together or pushes them apart.
The strength of that force depends on
-- the product of the amounts of charges on the two charged objects
-- the distance between the centers of their charges.
A sphere is charged with electrons to −9 × 10−6 C. The value given is the total charge of all the electrons present in the sphere. To calculate the number of electrons in the sphere, we divide the the total charge with the charge of one electron.
N = 9 × 10−6 C / 1.6 × 10−19 C
N = 5.6 x 10^13
Answer:it is a pure substance
Explanation:
All elements are pure substances because they are made up of only one type of atom