A 10kg mass is placed 3 meters from the fulcrum. At what distance would you need to place a 15kg mass to balance the lever? Show your work. (No links please)

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;

Answerthe valence of an element or radical is equal to the number of positive or negative charges on the ion.

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.