What is the speed of the animal from 0-20s?
50 m/s
0.4 m/s
20 m/s
2.5 m/s

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Which system of units is used by only a small number of countries in the world, including the u.s.

Ascientist is working with a new kind of quantum dot to make a dye. he is applying newton’s laws to the particle, but it seems to be breaking these laws of physics. which action will most likely the scientist study the particle’s motion? a. he needs to remember that the particle is too large for quantum analysis. b. he must continue to use newtonian mechanics, but he needs to learn more about the particle. c. he needs to use quantum mechanics, not newtonian mechanics, because this is a nanotechnology product. d. he must determine new physical laws that only apply to quantum dots.