Aroller coaster track is 3,000 meters long. it takes 100 seconds to travel once around the roller coaster. what is the average speedof the roller coaster? is the velocity constant throughout the trip explain.

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

A1.50-liter sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°c. without changing the temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.00 atmospheres. the volume of the gas is