R1=1 0 R3=3 0 ww- 6V + R2=2 0 + 9V ww

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A: This question is from relation between electric potential and electric field intensity.

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Q: (2) 10 13 V a I + 12 P

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Q: 1-Steady flow, means the velocity of liquid flow is constant for time at any point. True O False

A: We need to comment on the definition of steady flow.

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Q: What are the postulates for the Special Theory of Relativity?

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Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.