A500,000 kg cargo ship is traveling at 75 km/h when its engine is shut off. the magnitude of the frictional force between boat and water is proportional to the speed v of the boat: f k = 85v, where v is in meters per second and f k is in newtons. find the time in hours for the ship to slow to one-third of its original speed because of the friction with the water.

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

In the first law of thermodynamics, triangle e=q-w, what does q stand for