21. How much does the speed of sound increases/decreases per degree celsius? *
1 point
A. 331 m/s
B. 0.6 m/s
C. 1 m/s
D. all of the given
22. Which of the following is true about the effect of air temperature on the speed of sound? *
1 point
A. The lower the temperature the faster the speed of sound.
B. The higher the temperature the faster the speed of sound.
C. The higher the temperature the slower the speed of sound.
D. The temperature does not affect the speed of sound.
23. What is the relationship of temperature to the speed of sound? *
1 point
A. equally related
B. no relationship
C. directly proportional
D. inversely proportional
24. At normal weather condition, at which temperature of the day does the sound travel fastest? *
1 point
A. 20 ⁰C
B. 25 ⁰C
C. 30 ⁰C
D. 15 ⁰C
25. What makes the color violet have higher intensity than color red? *
1 point
A. Red has lower energy than violet.
B. Violet has lower energy than red.
C. Violet and red have equal intensity of light.
D. Red and violet are not related to each other.
26. Which best shows the correct arrangement of colors from the greatest energy to the least energy? *
1 point
A. V-I-B-G-Y-O-R
B. V-I-G-B-Y-O-R
C. R-O-Y-G-B-I-V
D. R-Y-O-G-B-I-V
27. ROYGBIV is the basic component of white light. Which color of light carries the most energy? *
1 point
A. blue
B. green
C. orange
D. red
28. As the frequency of the visible light increases, its energy __________. *
1 point
A. doubles
B. increases
C. decreases
D. is the same
29. Which of the following is true about the relationship between frequency and energy? *
1 point
A. The frequency of the color of light and energy are not related.
B. As the frequency of the color of light increases, its energy decreases.
C. As the frequency of the color of light decreases, the energy increases.
D. As the frequency of the color of light increases, the energy also increases.
30. As the wavelength of the visible light increases, the energy __________. *
1 point
A. doubles
B. increases
C. decreases
D. is the same
Pleasee brainliest you tomorrow