Asmall frictionless cart is attached to a wall by a spring. it is pulled 14 cm from its rest position, released at time tequals0, and allowed to roll back and forth for 5 seconds. its position at time t is s equals 14 cosine left parenthesis pi t right parenthesis. a. what is the cart's maximum speed? when is the cart moving that fast? where is it then? what is the magnitude of the acceleration then? b. where is the cart when the magnitude of the acceleration is greatest? what is the cart's speed then?

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.