In 1838, stated that all plants are made of cells who made this statement

Could someone . i have tried to solve myself but my calculation is off

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.