25. Sound wave is classified as
A. Transverse wave
C. Longitudinal wave
B. Surface wave
D. Standing wave
26. A thick string will produce which of the following sound?
A. high pitch sound
C. pleasant sound
B. noise
D. low pitch sound
27. Which of the following vibrational frequencies is below 20 Hz?
A. audible
C. ultrasonic
B. infrasonic
D. low quality sound
28. ROYGBIV is the basic component of white light. Which color of light carries the most energy?
A. Blue
B. red
C. Green
D. Orange
29. In convection, which of these statements is/are TRUE?
A. Warmed particles go down and cooled particles go up.
B. Warmed particles go up and cooled particles go down
C. Both warmed and cooled particles go up.
D. Both warmed and cooled particles go down
30. Energy through from the sun reaches the earth ?
A. ultraviolet waves
B. mechanical waves
C. infrared waves
D. electromagnetic waves
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Answer:
25. C. Longitudinal wave
26. D. low pitch sound
27. B. infrasonic
28. A. Blue
29. B. Warmed particles go up and cooled particles go down.
30. D. electromagnetic waves
Explanation: