Part 2 1) Explain why wave amplitude decreases with distance, such as sound waves getting harder to hear, light getting harder to see, or ripples get smaller and smaller? 2] In what phenomenon does the wavelength and frequency of a wave change? 3] How can you use reection to increase the amplitude of a wave? 4) Explain how a bat can identify exactly where an insect is and whether the insect is ying toward or away from the bat. 5] When two identical male undergo interference, the net amplitude is doubled. constructive destructive restricted DOU'ED orthogonal 6) Astronomers measure the light from a relatively nearby star and observe that the light frequency is shifted toward the blue end of the spectrum (increase in frequency]. This means the star is moving toward us. moving away from us. getting hotter. DOU'SD cooling off. 7) What is the speed of sound when the air is 0C? Show how you got your