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, 21.06.2019 22:30
The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force
Answers: 1
Physics, 21.06.2019 22:40
Explain vector addition, triangle method and parallelogram method
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Physics, 22.06.2019 18:00
The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.
Answers: 1
Physics, 23.06.2019 02:30
Aheavy boy and a lightweight girl are balanced on a massless seesaw. the boy moves backward, increasing his distance from the pivot point. what happens to the seesaw? it is impossible to predict without knowing additional information. the side the boy is sitting on will tilt downward. the side the girl is sitting on will tilt downward. nothing; the seesaw will remain balanced.
Answers: 2
How does an electric motor use magnetic force to produce motion? a. the north pole of a permanent...
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