Which one of newton's laws does a doll riding a dog represent

If element x has 99 protons how many electrons does it have

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

Consider motion in one dimension. (the sign of the vector quantities is their direction indicator.) an object moves in the positive x-direction with speed 2.9 m/s for 4.5 s. it stops for 3.8 s and then moves in the negative x direction with speed 2.8 m/s for 4 s. what is the total distance traveled by the object in units of meter? enter a number with two digits behind the decimal point.