Examine the nuclear reaction: why is this classified as a nuclear reaction rather than a chemical reaction?
it is not balanced.
a new compound is formed.
a change has occurred in a nucleus.
a new element has been formed

Which describe reflection? check all that apply. light bounces off a boundary.

What statements accurately describe atoms

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?