A mass on a spring in Simple Harmonic Motion (SHM) has amplitude A and period T. At what point in the motion, if any where, is the velocity zero and the acceleration zero simultaeneously

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

high-sugar diet and high cholesterol

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.