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
Graduated cylinder & beaker; both are used for science activities while a measuring cup is mostly used for baking.
Answer:
Provide reinforcement for appropriate behavior.
Explanation:
The use of reinforcements by teachers have been effective in eliminating overt behaviors by students. Different types of “reinforcers” have been tried out and deemed successful in changing student behavior. Nodding of head, clapping and smiling (which express approvals of actions) are some of the social reinforcers, pre-planned by teachers to help instill acceptable deeds.
In some other cases, other powerfully motivating reinforcers have been for the student to select class activities they wish to participate in and the preferred classmate they hope to have in such activities.
Answer: to be exact you need 28mm of tubing for that
Explanation:
When the election