4. Three charges are placed as shown. В С А +2 -2 +2 Charges A and C are held in place. Describe what charge B does. Give a reason for your answer. 5. Describe how it is possible for two waves to cancel each other out. 6. A 1200 W microwave oven is plugged into a 120 V outlet. a. Calculate the current required to operate the microwave oven. b. Calculate the resistance of the microwave oven. 7. Explain why concrete sidewalks can buckle in very hot weather. 8. The diagram shows a wave on a string. The string is vibrating at 250 Hz. AAA 0.6 m a. Calculate the wavelength of the wave. b. Calculate the wave speed. 9. Ralph puts a container of leftover spaghetti sauce into the refrigerator to cool off. 100,000 J of energy flow out of the sauce as it cools off. a. Explain why the work done during this process is zero. b. Calculate the change in internal energy of the spaghetti sauce. aluminum? dn 10. Why is it easier to heat up steel than it is to heat 11. How does the Doppler effect allow meteorologists to detect rotation in thunderstorms? 12. How is it possible for objects containing positive and negative charges to be neutral?

4. Three charges are placed as shown. В С А +2 -2 +2 Charges A and C are held in place. Describe what charge B does. Give a reason for your answer. 5. Describe how it is possible for two waves to cancel each other out. 6. A 1200 W microwave oven is plugged into a 120 V outlet. a. Calculate the current required to operate the microwave oven. b. Calculate the resistance of the microwave oven. 7. Explain why concrete sidewalks can buckle in very hot weather. 8. The diagram shows a wave on a string. The string is vibrating at 250 Hz. AAA 0.6 m a. Calculate the wavelength of the wave. b. Calculate the wave speed. 9. Ralph puts a container of leftover spaghetti sauce into the refrigerator to cool off. 100,000 J of energy flow out of the sauce as it cools off. a. Explain why the work done during this process is zero. b. Calculate the change in internal energy of the spaghetti sauce. aluminum? dn 10. Why is it easier to heat up steel than it is to heat 11. How does the Doppler effect allow meteorologists to detect rotation in thunderstorms? 12. How is it possible for objects containing positive and negative charges to be neutral?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter24: Electromagnetic Waves

Section: Chapter Questions

Problem 35PE: A 2.50-m-diameter university communications satellite dish receives TV signals that have a maximum...

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