Question

31. Which of the following factors does the speed of sound depend? A Density B Elasticity C. Temperaturo D. All of the above 32. An echo occurs when a sound wave is A Absorbed B. Rellected 2 C. Refracted D. Transmitted 4. 33. What happens to the speed of sound as the temperature increases? . A. Constant 6 B. Decreases C. Increases 2. D. Cannot be determined 34. Which phenomenon explains why sound is heard at longer distances at night than in day? A. Echolocation B. Reflection C. Refraction D. Reverberation 35. Sound travels faster through warm materials than cold materials because A. Warm particles move slowly B. Gas particles are packed tightly C. Warm particles are moving quickly D. Sound does not travel faster through a warm substance 36. Which has the least energy among the colors of a rainbow? A. Green B. Orange C. Red D. Violet 37. Violet is bent most among the seven colors because it has the A. Highest frequency B. Lowest frequency C. Longest wavelength D. Shortest wavelength 38. Nina sent an arrow beam of light through a prism. As a result, she observed the light dispersing into A. Four colors B. Three colors C. Five colors D. Seven colors 39. What refers to the bending of light as its passes from one mediurn into another? A Frequency B. Reflection C. Refraction D. Wavelength 40. Which of the following arrangements of visible light colors show decreasing wavelength? A Red, orange, yellow, green, blue, indigo, violet B. Red, yellow, green, orange, violet, blue, indigo C. Violet, blue, green, orange, red, indigo, yellow D. Violet, indigo, blue, green, orange, yellow, red​

Answer 1

Explanation:

31) Density

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Answer 2

Answer:

31.D

32.B

33.C

34.A

35.C

36.C

37.D

38.D

39.C

40.A

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