2 a) Which of the following statements is true? i) Sound is produced in a vibrating environment. ii) Sound can easily propagate in a vacuum. iii) You can talk to your friend on the Moon. iv) Sound is propagated in the air by successive compressions and thinning of the air. V) Too much noise can damage the ears. b) For any statement that is not correct, say what is wrong. Rewrite the statement correctly. 3 Native Americans could hear horses approaching by bringing their ears to the ground. Explain why?
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Which of the following is a homogenous mixture? o a. a toy box filled with toys o b. blood o c. trail mix o d. spaghetti and meatballs submit
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Determine the largest intensity w of the uniform loading that can be applied to the frame without causing either the average normal stress or the average shear stress at section b–b to exceed σ=19 mpa and τ=24 mpa, respectively.
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2 a) Which of the following statements is true? i) Sound is produced in a vibrating environment. ii)...
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