4 years ago

What are three things we should try to limit that we may find on a food label.

Physics

2 answers:

Dafna1 [17]4 years ago

5 0

Answer:

Added sugars, Saturated fat, Trans fat.

Explanation:

jeka944 years ago

4 0

Added sugars fat other stuff

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Two sites are being considered for wind power generation. In the first site, the wind blows steadily at 7 m/s for 3000 hours per

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Answer:

E.year₂ > E.year₁ (Second site is better)

Explanation:

Given data

$V_{1}=7 m/s\\Time_{1}=3000 hours/year\\V_{2}=10m/s\\Time_{2}=1500hours/year$

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Power=ΔKE=m×V²/2

Regarding that m ∝ V.Then

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Since ρa is constant for both sides and Area is the same as same wind turbine is used

For First site

$Power_{1}=const.V^3\\Power_{1}=const.(7m/s)^3\\Power_{1}=const.343Watt\\$

For second site

$Power_{2}=const.V_{2}^3\\Power_{2}=const.(10m/s)^3\\Power_{2}=const.1000W$

Calculating energy generation per year for each of two sites

E.year=Power×Operation time per year

For First site

E.year₁=Power₁×Operation time₁ per year

$E_{year1}=const.*343W*3000\\E_{year1}=const.1029000(W.hour/year)$

For Second site

E.year₂=Power₂×Operation time₂ per year

$E_{year2}=const.*1000W*1500\\E_{year2}=const.1500000(W.hour/year)$

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3 years ago

Air enters a compressor with a pressure of 14.7 lbf/in.2 , a temperature of 70F, and a volumetric flow rate of 40 ft3 /s. Air ex

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