Engineering, 21.11.2020 19:40, cia196785920

Marcie observes a boat floating on water and tries to explain to her mother why the boat is not moving. Which of the following explanations is the best to use? A. The force of gravity acting on the boat is the same as the force of the water pushing up. This means the forces acting on the boat are balanced. B. The force of gravity acting on the boat is the same as the force of the water pushing up. C. This means the forces are unbalanced. The force of the water pushing up on the boat is greater than the force of gravity pulling the boat down. This means the forces acting on the boat are balanced. D. The force of the water pushing up on the boat and the force of the boat pushing itself up allows the boat to float. The two forces are balanced.

Answers: 2

Show answers

Other questions on the subject: Engineering

Engineering, 03.07.2019 15:10, EmilySerna

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Answers: 1

continue

Engineering, 04.07.2019 18:10, chadatkin

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

Answers: 3

continue

Engineering, 04.07.2019 18:20, maustin5323

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]

Answers: 1

continue

Engineering, 04.07.2019 18:20, samantha636

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k

Answers: 2

continue

Do you know the correct answer?

Marcie observes a boat floating on water and tries to explain to her mother why the boat is not movi...