The drag coefficient for the car is Cp0.29, and the projected area into the 20°C airstream is 2.5 m². At this temperature P=1.202 kg/m² Egure 1) Figure 1 of 1 Part A Determine the power the engine must supply to maintain a constant speed of V-145 km/h. Express your answer to three significant figures and include the appropriate units P= Value Submit PA Provide Feedback 4 Request Answer Units

The drag coefficient for the car is Cp0.29, and the projected area into the 20°C airstream is 2.5 m². At this temperature P=1.202 kg/m² Egure 1) Figure 1 of 1 Part A Determine the power the engine must supply to maintain a constant speed of V-145 km/h. Express your answer to three significant figures and include the appropriate units P= Value Submit PA Provide Feedback 4 Request Answer Units

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter14: Vibrations And Waves

Section: Chapter Questions

Problem 107A

See similar textbooks

Similar questions

Suppose the car approches a hill and has the intial speed 106 km/h at the bottom of the hill. The driver takes her foot of the gas pedal and allows the car to coast up the hill. if, in actuality, a 740 kg car with an initial speed of 106 km/h is observed to coast up a hill and stops at a height 21 m above above its starting point, how much thermal engery was generate by friction in J?
In 1981, Daniel Goodwin climbed 443 m up the exterior of the Sears Building in Chicago using suction cups and metal clips. (a) Approximate his mass and then compute how much energy he had to transfer from biomechanical (internal) energy to the gravitational potential energy of the Earth–Goodwin system to lift himself to that height. (b) How much energy would he have had to transfer if he had, instead, taken the stairs inside the building (to the same height)?
A 4-ton air conditioner removes 5.06×107 J (48,000 British thermal units) from a cold environment in 1.00 h. (a) What energy input in joules is necessary to do this if the airconditioner has an energy efficiency rating ( EER ) of 12.0?(b) What is the cost of doing this if the work costs 10.0 centsper 3.60×106 J (one kilowatt-hour)? (c) Discuss whether this cost seems realistic. Note that the energy efficiency rating ( EER ) of an air conditioner or refrigerator is defined to be the number of British thermal units of heat transfer from a cold environment per hour divided by the watts of power input.
Calculate q when 29 J of work is done on a system and its internal energy increases by 96 J.
A 42 client with a body mass of 74 kg is interested in jogging on the treadmill as their primary means of exercise, while they listen to their "pump-up" music playlist that lasts exactly 28 minutes. To be sure they get the recommended volume of exercise each week, you'd like to have your client burn 350 kcal in each jogging session. To achieve this, what should your client set as the treadmill speed while running, in miles per hour?
what horsepower is required to isothermally compress 800ft^3 of air per minute from 14.7psia to 120psia? (answer 107.7hp)
Do diesel or gasoline engines operate at higher compression ratios? Why?
A lawnmower engine ejects 1.00 x 104 J each second while running with an efficiency of 0.200. Find the engine’s horsepower rating, using the conversion factor 1 hp = 746 W.
In a given location, would a helicopter require more energy in summer or winter to achieve a specified performance? Explain.
Determine the atmospheric work done as a 2-in cube of ice melts in a region of 1 atm. At 32°F, these densities obtain for water: liquid, 62.42 lb/ft³; solid, 57.15 lb/ft³.
Calculate the net work output (in J) of a heat engine following path ABCDA in the figure, where V1 = 1.5 ✕ 10−3 m3 and V2 = 6.0 ✕ 10−3 m3.
During real expansion and compression processes in piston cylinder devices, it has been observed that gases satisfy the relationship PVn = C, where n and C are constant. Calculate the work done when a gas expands from 350 kPa and 0.03 m3, to a final volume of 0.2 m3, for the case where n = 1.5.