2nd one I believe! If I’m wrong sorry
Answer:
Explanation:
1)Solution,
Distance(s)=30m
Time taken(t)=11s
Now,
Average velocity=s/t=30m/11s=2.72m/s
2)Solution,
Distance(s)=20km=20x1000m=20000m
Time(t)=9:30-8:30=1:30=60+30 min=90min=90x60=5400s
Now,
Average velocity=s/t=20000m/5400s=3.7m/s
Answer:
E.year₂ > E.year₁ (Second site is better)
Explanation:
Given data

The power generation is the time rate of kinetic energy which can be calculated as:
Power=ΔKE=m×V²/2
Regarding that m ∝ V.Then
Power ∝ V³ ⇒ Power=constant×V³
Since ρa is constant for both sides and Area is the same as same wind turbine is used
For First site

For second site

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

For Second site
E.year₂=Power₂×Operation time₂ per year

So
E.year₂ > E.year₁ (Second site is better)
<span>The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come.</span>
Physics is a very important part of Architecture. It helps you to understand how forces work on things that you build, so that they don't collapse. So yes, you do.