Answer:
Amount reduction is 29.06 gal/year
Cost of reduction is $90.09 / year
Explanation:
Assume The effect of reduction of the frontal area on the drag coefficient is
negligible
Given that:
The drag coefficient () = 0.4 for a passenger car.
A = frontal area of car = 18 ft²
Velocity (V) = 55 mile per hour = (55 × 1.4667) ft/s = 80.6685 ft/s, density of air (ρ) = 0.075 lbm/ft³
The frontal drag force can be calculated by:
The amount of work done to overcome this drag force is calculated by:
d = 12000 miles per year
and the required energy input is:
Heating value (HV) = 20000 Btu/lbm
Amount of fuel =
Cost of fuel = Amount of fuel × Price of fuel = 11.1 ft³/year × ($3.1/gal) × (7.4804 gal / 1 ft³) = $257.4 per year.
The percent reduction in the fuel consumption due to reducing frontal area (reduction ratio) is given by:
Reduction ratio =
Amount reduction = Reduction ratio × Amount of fuel = 0.35 × 83.03 gal/year =29.06 gal/year
Cost of reduction = Reduction ratio × cost of fuel = 0.35 × $257.4 = $90.09 / year
Answer:
Massive destruction
Explanation:
If the asteroid collides with the ground, a massive volume of dust will be blasted into the environment. If it collides with water, the amount of water vapour in the atmosphere will rise. This would result in more rain, which would cause earthquakes and mudslides.
As the asteroid collided with the Earth, massive volumes of dust were ejected into to the atmosphere. The sun's light were stopped from entering the Earth's surface, which is terrible news for plants.
Answer:
The four basic families of shape production processes are:
(1) Casting, (2) Material removal, (3) Deformation processes, and (4) Consolidation
processes.
1. Casting processes can produce extremely complex shapes, but may have defects related to shrinkage and porosity.
2. Material removal processes can have outstanding precision, but generate scrap as the material is cut away.
3. Deformation processes can offer high rates of production, but require powerful equipment and
dedicated tools or dies.
4. Consolidation processes can produce large or complex shapes, but the joints may possess properties that are different from the base material.
Technician A is incorrect so that means Technician B is correct.