Answer:
Vd = 6.58×10-⁵m/s
Explanation:
See the attachment below.
Answer:
B. 34.78 m/s
Explanation:
The momentum of an object is given by:
where
p is the momentum
m is the mass of the object
v is its velocity
For the object in this problem, we have
p = 4000 kg m/s
m = 115 kg
So, we can solve the equation to find v, the velocity:
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Answer:
121.43 m
Explanation:
Solution
Since standing waves are set up, the expression for the first mode of frequency is f₁ = nv/4L. The next mode of frequency is f₂ = (n + 2)v/4L where L is the length of the tunnel and v the speed of sound. f₁ = 5.0 Hz, f₂ = 6.4 Hz, v = 340 m/s. We now subtract f₂ - f₁ = (n + 2)v/4L - nv/4L = v/2L.
So f₂ - f₁ = v/2L. and L = v/2(f₂ - f₁) = 340/[2× (6.4-5.0)] = 340/2×1.4 = 340/2.8 = 121.43 m
So, it is 121.43 m far to the end of the tunnel.