PLEASE HELP I'LL GIVE BRAINLIEST: Consider a sound wave produced by a tuning fork. Through which materials would the sound trave
l the fastest? Order the materials shown according to the speed at which a sound wave would travel through them, from slowest to fastest.
2 answers:
Answer:
cold air
hot air
the ocean
glass
Sound is a moving density wave. it can travel through basically any normal form of matter. What does this mean density wave? well what this means is that you have a domino effect bascally, one air molecule is moving, it bumps its neighbor then its naghborr bumps its other neighbor and it keeps going until the sound energy is dispersed or turned into heat.
The wave speed of sound depends upon how close the molecules are to each other. It is like plucking a string. if you pull it tight the string vibrates much more frequently than if you hold it very loosely. In air, the molicules are quite far apart from each other, so the sound travels a lot slower but in a metallic material, the atoms are shoulder to shoulder and the speed of sound is about 1300 mph were as in the air it's about 300 mph.
Hope it helped
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Answer:
Her speed is 9.8 meter per second
Explanation:
Newton's second law states that acceleration (a) is related with force (F) by:
(1)
Here the only force acting on the firefighter is the weight F=mg so (1) is:
Solving for a:
Now with the acceleration we can use the Galileo's kinematic equation:
(2)
With Vf the final velocity, Vo the initial velocity and Δx the displacement, because the firefighter stars from rest Vo=0 so (2) is:
Solving for Vf