3. The figure below shows electric field in three regions of space and in each region two points in space, A and B. (a) (b) ( c ) (a) How is the electric field represented in these drawings, with electric field arrows at each point or with the electric field lines? (b) Explain how one would determine whether the electric field at point A is stronger, equal in strength, or weaker than the electric field at point B, and use that method to determine how to strengths compare in each picture. Waves 4. What is the frequency of your heartbeat when you are resting? Explain in detail how you measured it and calculated it. 5. For this problem print the grid from the last page of the problem set. You can print as many as you'd like. Taking each square in the grid below to be 0.25 m, (a) Sketch and label three waves, A, B, and C, all with amplitude of 1 m, but with wavelengths of 2A= 2.0 m, AB= 3.0 m, and ac= 4.5 m. (b) Sketch and label three waves three waves, D, E, and F, all with wavelengths of 2= 1.5 m, but with amplitudes ymD= 0.50 m, and yme= 1.0 m, and ymF-2.0 m. (c) If the speed of wave A is SA=2.0 m/s, calculate its frequency, UA, and its period, TA. (d) How long does it take the point on the crest of your wave A to move all the way down (and become a trough) and then come back all the way up to original crest? (e) Redraw wave A: If the wave is moving to the right, sketch with a dashed line what it would look like after 0.5 seconds. See the next page