How do you know? What evidence do you have that circular motion requires a force toward the center of the circle?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Which describes an object in projectile motion? check all that apply.a.gravity acts to pull the object downb.the object moves in a straight path.c.the forward velocity of the object is 0 m/s.d.the object’s inertia carries it forward.e.the path of the object is curved.

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match