1.A cork oating on a lake bobs up and down as a wave passes. The cork completes 6.00 cycles in 3.00 s. The wave peaks are 21.0 cm apart. Find the speed of the wave. Part 1 + Give the equation used for finding the speed of a wave in terms of its wavelength () and its frequency (f). 2 Find the speed of the wave. 2. Radio waves are electromagnetic waves that travel at a speed of 3.00 108 m/s, the speed of light. An AM radio station has an assigned frequency of 641 kHz, which means that the radio waves broadcast by the station are at this frequency. Find the wavelength of these radio waves 3. The crowd at a baseball game starts the wave, which propagates through the stadium. If the effective wavelength is 1.50 m and the frequency is 1.80 s, what is the propagation speed of the wave? 4. Suppose you want to demonstrate the Doppler effect for deep-water waves, using a 8.50 Hz source moving toward a stationary observer. How fast would the source have to move through the water if the frequency of the waves seen by the observer is to be 3.00 times the frequency of the source? 5. If two 65.0 nC point charges exert a force of 0.800 N on each other, what is the distance between them? 6. If the electric field 0.200 m from a point charge is 1.4910^4 N/C, what is the magnitude of the charge? 7. What is the potential 7.6010^-11 m from a proton