Suppose a car travels 108 km at a speed of 33.0 m/s and uses 1.8 gal of gasoline. Only 30% of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. (The energy content of gasoline is 140 MJ/gal.)
(a) What is the magnitude of the force exerted to keep the car moving at constant speed?
(b) If the required force is directly proportional to speed, how many gallons will be used to drive 108 km at a speed of 28.0 m/s?
Answers: 2
Another question on Physics
Physics, 22.06.2019 07:30
Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories
Answers: 3
Physics, 22.06.2019 10:20
Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?
Answers: 1
Physics, 22.06.2019 14:30
70 give a real life example showing how sensory neurons work with the motor neurons
Answers: 2
You know the right answer?
Suppose a car travels 108 km at a speed of 33.0 m/s and uses 1.8 gal of gasoline. Only 30% of the ga...
Questions
History, 16.10.2020 23:01
English, 16.10.2020 23:01
Mathematics, 16.10.2020 23:01
Social Studies, 16.10.2020 23:01
English, 16.10.2020 23:01
Mathematics, 16.10.2020 23:01
History, 16.10.2020 23:01
Engineering, 16.10.2020 23:01
English, 16.10.2020 23:01
Mathematics, 16.10.2020 23:01
Geography, 16.10.2020 23:01
