1. what is the the difference between reactants and products of a chemical equation. 2. what does the law of conservation of mass state?

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?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

State the following: boyle's law and charle's law