No conclusive evidence exists on “average” 1-mile run times, because there is no scientifically agreed-upon average runner. Opinion varies widely, but most anecdotal evidence places the average between seven and 10 minutes per mile for a non-competitive, in-shape runner.
Answer:
d= 7.32 mm
Explanation:
Given that
E= 110 GPa
σ = 240 MPa
P= 6640 N
L= 370 mm
ΔL = 0.53
Area A= πr²
We know that elongation due to load given as
A= 42.14 mm²
πr² = 42.14 mm²
r=3.66 mm
diameter ,d= 2r
d= 7.32 mm
Answer:
Explanation:
velocity v = Δx/Δt
Δx is the change in displacement
Δt is the change in time
Δx = vΔt
Given v = 1100ft/s
Δt = t2-t1
Δt = 13-5.6
Δt = 7.4s
Δx = 1100*7.4
Δx = 8,140ft
Hence the distance of the airplane from the person at the instant of the bolt is 8,140ft
Since the air moves at constant speed, it means the speed is not chnaging hence the velocity of the air v is the same as the constant speed.
velocity of the airplane vp = Δx/Δt
Δx = 8,140ft
Δt = t2+t1
Δt = 13+5.6
Δt = 18.6s
Substituting the given values into the formula vp = Δx/Δt
vp = 8,140/18.6
vp = 437.63m/s
Hence the velocity of the airplane is 437.63m/s
