The missile will be above 26 feet for an interval of and 3 seconds. The formula for the relationship between the three known quantities and time is y=viyt+0.5ayt2.
The vertical motion alone determines the duration of projectile motion. The time a projectile spends in the air is 3.79 seconds if it has a starting vertical velocity of 21.2 m/s and lands 10.0 m below its starting altitude. Gravity causes a vertical acceleration with a value of 9.8 m/s/s downward, whereas a projectile's horizontal velocity is constant (a value that never changes). A projectile's vertical velocity fluctuates by 9.8 m/s per second, A projectile's horizontal motion is unrelated to its vertical motion.
The chemical change occurred. Electrolysis is used by scientists to make chemical reactions that wouldnt normaly spontaniously ocur. In this case we are getting new gases from water molecul which is change in structure of elements ( we are getting new moleculs)
