The electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity. What is the potential (relative to infinity) at a distance of 2 m from the same charge?

A) 200 V
B) 50 V
C) 400 V
D) 100 V
E) 600 V


C

Physics & Space Science

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In the Orion constellation are stars Rigel, a blue supergiant, and Betelgeuse, a red supergiant. Which star has a greater surface temperature?

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The helium atom has one more electron than hydrogen. The chemical properties differ because helium

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