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Monica [59]
3 years ago
7

What condition is necessary for an object to make a good reference point?

Physics
1 answer:
777dan777 [17]3 years ago
8 0
The object is fixed relative to the motion you are trying to describe.
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Images formed by a convex mirror are always ​virtual

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the work done by the 30N force is 4156.92 J.

For this problem, they don´t ask you to determine the work of the total force applied in the block. They only want the work done for the force of 30N, with an angle of 30º respectively of the displacement and a traveled distance of 160m. So:

W=F·s·cos(α)=30N·160m·cos(30º)=4156.92J

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An incident ray of light strikes water at an angle of 30°. The index of refraction of air is 1.0003, and the index of refraction
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