What is a variable? o a. a summary of another scientist's work o b. an educated guess about the outcome of an experiment o c. something that can change during an experiment o d. the analysis of the results of an experiment

The two required components for a generator are

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.