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, 21.06.2019 15:00
If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.
Answers: 2
Physics, 21.06.2019 23:00
Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's
Answers: 2
Physics, 22.06.2019 02:00
The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e
Answers: 3
Physics, 22.06.2019 08:00
Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.
Answers: 3
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, 20.07.2019 14:30
English, 20.07.2019 14:30
Mathematics, 20.07.2019 14:30
Social Studies, 20.07.2019 14:30
History, 20.07.2019 14:30
Mathematics, 20.07.2019 14:30
English, 20.07.2019 14:30
History, 20.07.2019 14:30
Spanish, 20.07.2019 14:30
