B. The object stops from a velocity of 12.0 m/s
Answer:
The amplitude of the eardrum's oscillation is 6.65×10^-13 m.
Explanation:
Given data:
The sound has a frequency of 262 Hz
The sound level is 84 dB
The air density is 1.21 kg/m^3
The speed of sound is 346 m/s
Solution:
As, Intensity of sound is given by,
I = Io×10^(s/10 db)
I = 2×π^2×ρ×v×f^2×Sm^2
Thus,
Sm = √(Io×10^(s/10 db)) / √( 2×π^2×ρ×v×f^2)
Now, put the values,
Sm = √( 10^-12 × 10^(84/10) ) / √( 2×(3.14)^2×1.21×346×(262)^2 )
Sm = √(2.51×10^-4 / 5.66×10^8)
Sm = √0.443×10^-12
Sm = 6.65×10^-13 m.
Answer:
Fm = 51N and Fj = 26N
Summing the moments about the shoulder joint
Sum of anticlockwise moments = sum of clockwise moments
Fm x 12 = mg x 24
Fm = 2.6 x 9.8 × 24/12
Fm = 51N
Summing the forces acting on the arm
Sum of upward forces = sum of downward forces
Fm = Fj + mg
51 = Fj + 2.6 × 9.8
51 = Fj + 25.48
Fj = 51 - 25.48
Fj = 26N
Explanation:
Newtons first law and the principle of moments have been applied in solving this problem.
Answer: DENVER, COLORADO
Explanation: Temperature inversion is the term used to describe the increase in temperature as the height increases towards the Toposphere, Temperature inversion is a reverse of the normal temperature flow or distribution in the atmosphere.
Denver, Colorado has been known to be one of the Cities of the World where temperature inversion occurs frequently. The TOPOGRAPHY of Denver, Colorado makes it prone to temperature inversion, Denver, Colorado is located at the foot of mountains.
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