A toy car is placed at 0 on a number lineit moves 8 cm to the left then 4 cm to the right and then 6 cm to the left. What is the total distance the car moved?

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?