21. Through which material sound travels slowest? *
a. Air at 20°C
b.Air at 40°C
c. Glass
d. Rubber
22.In what medium does the sound travel slowest? *
a. Liquid
b. Gases
c. Solid
d. Plasma
23. In which temperature / condition does sound travel fastest?
a. Hot
b. Normal
c. Cold
d. Freezing point
24. Why does sound travel faster at night than day? *
a. The sound wave travels slower due to no sunlight.
b. The sound wave travels faster due to the warmth of the sun.
C.The sound waves travel and refract from the warmer region towards the cooler region.
d. The sound waves travel and refract from the cooler region towards the warmer region.
25. A property of sound used by scientists to map the seafloor and to determine the depth of the ocean or sea. *
aEcho
b.refraction
C. reflection
d.Reverberation
help posummative po need na po ngayon wag sasagot kung di alam ang sagot
a. Air at 20°C
b.Air at 40°C
c. Glass
d. Rubber
22.In what medium does the sound travel slowest? *
a. Liquid
b. Gases
c. Solid
d. Plasma
23. In which temperature / condition does sound travel fastest?
a. Hot
b. Normal
c. Cold
d. Freezing point
24. Why does sound travel faster at night than day? *
a. The sound wave travels slower due to no sunlight.
b. The sound wave travels faster due to the warmth of the sun.
C.The sound waves travel and refract from the warmer region towards the cooler region.
d. The sound waves travel and refract from the cooler region towards the warmer region.
25. A property of sound used by scientists to map the seafloor and to determine the depth of the ocean or sea. *
aEcho
b.refraction
C. reflection
d.Reverberation
help posummative po need na po ngayon wag sasagot kung di alam ang sagot
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Answer:
21.A Air at 20°C
22.B gases
gases
However, the speed of sound varies from substance to substance: typically, sound travels most slowly in gases, faster in liquids, and fastest in solids.
23.C cold
Molecules at higher temperatures have more energy and can vibrate faster and allow sound waves to travel more quickly. The speed of sound at room temperature air is 346 meters per second. This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.
24.B
At night the ground cools quickly. The higher air is warmer than the air close to the ground. During the day the sound travels faster near the ground. ... The sound further from the ground travels faster at night causing the sound wave to refract back towards the earth.
25.A
Sonar, short for Sound Navigation and Ranging, is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves.
Explanation:
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