Physics, 07.08.2019 05:20 alannaamarriee
A1: 3 scale model of a torpedo is tested in a wind tunnel to determine the drag force. the prototype operates in water, is 533 mm in diameter, and is 6.7 m long. the desired operating speed of the prototype is 28 m/s. to avoid compressibility effects in the wind tunnel, the maximum speed is limited to 110 m/s. however, the pressure in the wind tunnel can be varied while holding the temperature constant at 200c. at what minimum pressure should the wind tunnel be operated to achieve dynamically similar test? at dynamically similar test conditions, the drag force on the model is measured as 618 n. evaluate the drag force expected on the full scale torpedo.
Answers: 2
Physics, 22.06.2019 11:00
Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?
Answers: 2
Physics, 22.06.2019 18:50
An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
Answers: 2
Physics, 22.06.2019 19:00
The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.
Answers: 1
Physics, 23.06.2019 10:20
Why does a smaller car get better gas mileage than a bigger one?
Answers: 1
A1: 3 scale model of a torpedo is tested in a wind tunnel to determine the drag force. the prototype...
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