Physics, 14.07.2019 06:50 victoriazh2005
How does an electric motor use magnetic force to produce motion? a. the north pole of a permanent magnet placed in the center of an electromagnet attracts the north pole of the electromagnet. b. the north pole of an electromagnet placed in the center of a permanent magnet attracts the north pole of the permanent magnet. c. the north pole of a permanent magnet placed in the center of an electromagnet repels the north pole of the electromagnet. d. the north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet.
Answers: 1
Physics, 22.06.2019 02:30
Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.
Answers: 1
Physics, 22.06.2019 15:20
Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.
Answers: 3
Physics, 22.06.2019 17:20
Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums
Answers: 2
How does an electric motor use magnetic force to produce motion? a. the north pole of a permanent...
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