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help with physical science?
1.The number of waves passing through a bend in one second is the_______of wave. 2.When the string of a violin played with a bow, violin vibrates in_______. 3.Waves bending due to the change in velocity is called______. 4.When u pinch coils of a spring together, u cause a _________. 5th The ______is the material through which a mechanical wave travels. 6.The type of a wave of press coils of a spring & let them go is_________. 7th If an obstacle is much larger than the wavelength of a wave, almost none (refraction, reflection) diffraction occurs. 8.A student has a metal bar & turn it w / a hammer A) in a direction parallel to its length, and B) in one direction at a right angle to its length. What kind of waves s produced in each case? 9.Why do all loud sounds cause a glass object to break? 10th A light passes at an angle through a piece of glass in the air. What happened with it in one of the normal? Why? If you can .. please help me!
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