Physics, 23.01.2020 18:31 skylastrusz7643
Aboy and his dog are out for a morning excursion to the river, whichis located 4.0 km away. the boy walks briskly at 2.0 m/s in a straight line. the dog isunleashed and runs back and forth at 4.5 m/s between the boy and the river, until bothreach the river. what is the distance run by the dog?
Answers: 3
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An insulated 40 ft^3 rigid tank contains air at 50 psia and 120Β°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.
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Aboy and his dog are out for a morning excursion to the river, whichis located 4.0 km away. the boy...
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