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:
Distance: 21 yd, displacement: 15 yd, gain in the play: 12 yd
Explanation:
The distance travelled by Sam is just the sum of the length of each part of Sam's motion, regardless of the direction. Initially, Sam run from the 3 yd line to the 15 yd line, so (15-3)=12 yd. Then, he run also 9 yd to the right. Therefore, the total distance is
d = 12 + 9 = 21 yd
The displacement instead is a vector connecting the starting point with the final point of the motion. Sam run first 12 yd straight ahead and then 9 yd to the right; these two motions are perpendicular to each other, so we can find the displacement simply by using Pythagorean's theorem:
Finally, the yards gained by Sam in the play are simply given by the distance covered along the forward-backward direction only. Since Sam only run from the 3 yd line to the 15 yd line along this direction, then the gain in this play was
d = 15 - 3 = 12 yd