Physics, 31.07.2019 01:30 anjali1097
maglev trains, like the one shown in the picture, use magnet fields to travel up to 600 miles per hour. magnets on the bottom of the train and on the tops of the rails have similar magnetic poles. based on properties of magnets, how do these magnets affect the train? a)the two magnetic fields repel each other, causing the train to levitate, or hover, above the rails. b)the powerful magnets greatly reduce the force of gravity, resulting in less friction and greater speed. c)the train is able to stop immediately because the magnets on the rails attract the magnets on the train. d)maglev trains have extremely powerful magnets, greatly decreasing the force of gravity and allowing them to float.
Answers: 2
Physics, 22.06.2019 07:30, bell777
30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve
Answers: 1
Physics, 22.06.2019 09:30, officialariana01
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 3
maglev trains, like the one shown in the picture, use magnet fields to travel up to 600 miles...
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