how far away is a train if you see the steam from its nozzle 4.5 seconds before you hear its sound? (take the speed of sound as 331m/s if u answer this question u are clever

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

Which notation is used to represent an alpha particle? a. b. c. d.

Asystematic approach to problem solving is called a (an)