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24. Two waves in a string, each of wavelength 2, are approaching each other with the same speed. Which of the following best represents the shape of the rope when both pulses are in the region AB? B D. A. B. 25. Block A has the same volume as a block B, which is much denser than block A. Which is heavier? A) Both have the same weight B) Block A C) Block B D) It cannot be determined without knowing their volumes 26. Block A has the same volume as a block B, which is much denser than block A. If both blocks are placed in water, which one has the greater buoyant force on it? 1.28 .8 A) Both have the same buoyant force. B) Block A C) Block B D) It cannot be determined without knowing their volumes 7. If two metal balls each have a charge of 0.001C and the repulsive force between them is 00 N, how far apart are they? 1.0 m B. 1.4 m C. 2.5m D. 2.8 m E. none of the above