The best method to use in prevention of self-demagnetization of a permanent magnet is by use of a keeper. Keepers were also commonly known as amateurs. They help in storing magnets safely, especially those that have low coercivity ( magnets that are extremely susceptible to stray fields).
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Answer:
<em><u>Incomple</u></em><em><u>te</u></em><em><u> </u></em><em><u>ques</u></em><em><u>tion</u></em><em><u>!</u></em>
you have to provide mass to get acceleration
as Newton's 2nd law, force=mass×accln
now,here force toward D is 100N,if it hav mass m
then accln will be 100/m
Waves can and do meet boundaries in their medium. When a wave meets a boundary, it can be reflected or transmitted. ... Refraction occurs when a wave crosses a boundary from one medium to another. A wave entering a medium at an angle will change direction.
Answer:
A. Moving the mass from Point C to B, although it involves a greater distance, requires less force to do the same amount of work.
Explanation:
The amount of work will be the same either way. By going from C to B, the mover will exert less force over a greater distance, which is easier than exerting a greater force over a shorter distance.
Answer:
Explanation:
Given
mass of couch
acceleration of couch
inclination
Let coefficient of kinetic Friction
as couch begins to slides Forces act on couch
, where is friction force
therefore net acceleration is