The rigth answer is 14.7N
The law of gravitation thus makes it possible to calculate a force exerted between two objects. In a terrestrial reference system, we can then calculate the force exerted between the Earth and an object.
The law applied in this case is P = mass x g (gravitational constant = 9.8 N / kg)
if a book weighs 1.5 kg then: P = 1.5 x 9.8 = 14.7N
The answer is 62 percent. <span>By 1999, after the Clean Water Act had been passed in 1970, the percentage of U.S. surface waters safe for fishing and swimming had increased from 36 percent to 62 percent. </span>
I believe it is a because usually the first a one is marijuana and
