Answer:
ananswer my question please
Answer:
A) ΔL = 0.544 mm
B) Δd = -0.0168 mm
Explanation:
We are given;
Elastic modulus; E = 67.1 GPa = 67.1 × 10^(9) Pa
Force; F = 46400 N
Diameter; d = 17.8 mm = 17.8 × 10^(-3) m
Radius; r = d/2 = 17.8/2 = 8.9 mm = 8.9 × 10^(-3) m
Length; L = 196 mm = 0.196 m
Poisson ratio; ν = 0.34
A) We know that formula for elastic modulus is;
E = σ/ε
Where;
σ = F/A
ε = ΔL/L
Thus;
E = (FL/ΔL•A)
ΔL is change in length. Making it the subject of the formula, we have;
ΔL = FL/AE
Now, A = πr²
A = π × (8.9 × 10^(-3))²
ΔL = [(0.196 × 46400)/(π × (8.9 × 10^(-3))² × 67.1 × 10^(9)]
ΔL = 0.544 × 10^(-3) m
ΔL = 0.544 mm
B) formula for Poisson ratio is given as;
ν = -ε_x/ε_z
Where;
ε_x is transverse strain = Δd/d
ε_z is longitudinal strain = ΔL/L
Thus;
ν = -Δd•L/d•ΔL
Making Δd the subject, we have;
Δd = -νdΔL/L
Δd = -(0.34 × 17.8 × 10^(-3) × 0.544 × 10^(-3))/0.196
Δd = -0.0168 × 10^(-3) m = -0.0168 mm
Answer:
The reason why many sustainable fishing and forestry practice depend on the actions of consumers like me is:
- <u>The offer is aimed at satisfying the demand for these products</u>.
Explanation:
Sustainable fishing and forestry are based on allowing future generations to access the same products that we currently have, for this reason, a sustainable fishing practice can be waiting for fish to reproduce, in order to not to overexploit them and thus to extinguish them, however, as mentioned in the answer, the offer is aimed at satisfying the demand, therefore, <u>if consumers like me demand sea products even though they are not in the breeding season or without providing the time for the ecosystem to recover the extracted products, the supply will be forced to supply the demand despite the extinction of a species; The same applies to sustainable forestry, if they carry out reforestation work on wood products in proportions 10-1 (10 plants planted for each tree cut) or higher, but the consumer does not provide the prudent time to obtain wood products again, the indiscriminate felling in order to supply the product required by the consumer</u>.
Answer:
The Mach number is 2.866
Total temperature To = 528.524K
Explanation:


Temperature (T) = 200K
For air, r= 1.4
To find the Mach number we use:
![Po/P = [1 + (r - 1/2) M^2] ^ r^/^r^-^1](https://tex.z-dn.net/?f=%20Po%2FP%20%3D%20%5B1%20%2B%20%28r%20-%201%2F2%29%20M%5E2%5D%20%5E%20r%5E%2F%5Er%5E-%5E1%20)
![1.5 * 10^6 / 5 * 10^4 =[ 1 + (1.4 -1 /2) (M^2) ] ^ 1^.^4^/^1^.^4^-^1](https://tex.z-dn.net/?f=%201.5%20%2A%2010%5E6%20%2F%205%20%2A%2010%5E4%20%3D%5B%201%20%2B%20%281.4%20-1%20%2F2%29%20%28M%5E2%29%20%5D%20%5E%201%5E.%5E4%5E%2F%5E1%5E.%5E4%5E-%5E1%20)




1.6426 = 0.2M^2


M = 2.866
To find Total Temperature :
![To/T = (Po/P)^r^-^1^/^8) [tex][tex] To/200 = (1.5*10^6 / 5*10^4)^ 1^.^4^-^1^/^1^.^4)](https://tex.z-dn.net/?f=%20To%2FT%20%3D%20%28Po%2FP%29%5Er%5E-%5E1%5E%2F%5E8%29%20%5Btex%5D%3C%2Fp%3E%3Cp%3E%3C%2Fp%3E%3Cp%3E%5Btex%5D%20To%2F200%20%3D%20%281.5%2A10%5E6%20%2F%205%2A10%5E4%29%5E%201%5E.%5E4%5E-%5E1%5E%2F%5E1%5E.%5E4%29%20)

To =528.524K