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A projectile (shot from a cannon, for instance) will fly in a curved line and land on the ground, due to the attraction of the Earth's gravity. Snipers have to allow for this curvature effect, and also the side pressure from any wind.
No. It is affected by localised pressure differences, thermals - which depend on the the heat-retention property of the surface, surface contours (including man-made ones).
The 'perimeter' of any closed figure drawn on paper means the total distance around it. If the figure consists of straight lines, then the perimeter is the sum of the lengths of all the straight-line pieces. If you set an ant down at a certain point on the figure and he started walking along the line, the perimeter is the distance he would have to walk in order to wind up at the point where he started.
Most homeowners policies now have an total exclusion for wind damage or a higher deductible for hurricane damages. This should be stated on the declarations page of your policy (where you see your coverages and limits and cost of each). //
Too many unknown variables ! What's the mpg, is it a flat road, it the road straight, wind speed & direction....