Use the drop-down menus to match each part of the scenario to the correct scientific practice.
Akira records the speed of a reaction, first without a catalyst, and then with a catalyst. collecting data
Akira creates a reaction without a catalyst, then repeats the reaction with a catalyst.
Akira turns in a written lab report to his science teacher
Akira wonders, "Will adding a catalyst speed up this chemical reaction?"
Akira writes in his notes that adding a catalyst sped up the chemical reaction because the catalyst lowered the
activation energy needed to start the reaction.
2020
2020

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.