Assignment: Locating the Epicenter Exploration All over the Earth, seismographic stations keep their instruments operating all the time. By Uming the animal of Pwaves and Swaves, scientists at each station can tell how far their station is from the source of any earthquake. That distance is used as the radius of a drde around the gallon on a map of the world. The radius is the dislance from the center of the circle to any point on the clrcle. By comparing the distance from several stallons, selsmologists can locate the earthquake's epicenter. Look at the map. Notice that the three circles ovedap. The location where they overlap is the approximate epicenter of the earthquake. Finding the Epicenter Find the length of the radius of each circle. To calculate the radius, divide the distance from the eplcenter by 640 am Seismograph records were obtained from an earthquake in Central America. Using the Informabon in the table, locate the epicenter on the map. You will need a compass and ruler. On this map. 1 cm is equal to 640 km​
Buenos Aires 1 min, 50 sec 1,600 km
Lima 3 min, 45 sec 2,400 km
Brasilia 4 min, 5 sec 2,880 km

Player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. what is the horizontal velocity component of the ball to the nearest tenth of a m/s?

19. explain why a magnet from your refrigerator could not be used to lift something as heavy as a car. (chapter 7 – pages 202-203) 20. can a magnet ever have a single pole? explain your answer. (chapter 7 – page 208) 21. what happens to the wavelength of a wave if the frequency is increased? (chapter 9 – pages 280-281) 22. an ocean wave has a wavelength of 10 m and a frequency of 4.0 hz. what is the velocity of the wave? show the appropriate equation from your book and show your work with units. (chapter 9 – page 282) 23. as you sit outside, the sound of a siren becomes lower in pitch. is the emergency vehicle moving away from or towards you? explain how you know. (chapter 10 – page 315-316) 24. why are two astronauts in space unable to hear one another? (chapter 10 – page 307) 25. explain in at least 3 sentences how electromagnetic waves form. (chapter 11 – page 338-339) 26. using the chart on page 345 in your textbook, what are the three types of electromagnetic wave with wavelengths shorter than those of visible light. give an example of each. (chapter 11 – pages 345-351) 27. explain why a leaf usually appears to be green, but a rose typically appears red. (chapter 12 – page 373) 28. what is the difference in light that is refracted compared to light that is reflected? think in terms of speed of light as well as what happens to light waves when they interact with a medium. (chapter 12 – pages 369-370) 29. how are concave and convex lenses different? (chapter 13 – page 408-410) 30. what type of mirror is used in rearview mirrors in cars? why is it important that these mirrors have the warning, “objects in mirror are closer than they appear.”? (chapter 13 – page 405)

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.