You are watching fans at a baseball game do "The wave". What are the speed, amplitude, wavelength , and frequency of that wave?

What are two different ways you could find the value of a? explain these methods.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

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.