12. Below is a sample illustration of sound wave. What type of wave is a sound wave?
A. transverse wave
C. electromagnetic wave
B. longitudinal wave
D. none of these
13. Sound is a vibration that transfers energy from molecule to molecule. Which of the following is the speed of sound of air at 20 degree Celsius?
A. 355 m/s C) 343 m/s
B. 1144 m/s
D. 349 m/s
14. Sound waves propagate through different mediums. When the temperature of a medium increases, what happens to the speed of sound? A. Increases C. Remains the same B. Decreases D. None of them
15. What will be the speed of sound if the temperature of the air in degree Celsius is 40? A. 345 m/s C. 355 m/s B. 325 m/s
D. 335 m/s

I need answer pls
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