Why does sound move fastest in solid mediums?
2 answers:
The particles are closest together in solids. Think about water. You can pass your hand through steam because there is a lot of space between the particles. Liquid water is a little harder to pass through, but it can be done. The particles in ice, however, are so close together that an object cannot pass through it.
Mechanical waves travel fastest through solids and slowest through gases.
Therefore the answer is solids.
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Answer:
Explanation:
Given
Initial speed
distance traveled before coming to rest
using equation of motion
where v=final velocity
u=initial velocity
a=acceleration
s=displacement
for
using same relation we get
divide 1 and 2 we get
So a distance if 213.32 ft is required to stop the vehicle with 80 mph speed
Answer:
Pi(3.14) radians or 180º degrees
Explanation:
First of all, we need to obtain the wavelength of a wave traveling to the speed of sound and 420 Hz of frequency.
The formula is:
where l = wavelength in meters
With current values:
l = 336 [m/s]/420[1/s] = 0.8 meters
Since a complete cycle (360º or 2pi radians) needs 0.8 meters to complete, 0.4 meters or 40 cm is just half of it, making a 180º degree phase or 3.14 radians.