Saturday, December 19, 2015

A Thin Spherical Shell

2. A thin spherical shell of radius x₁ cm has x₂ µC of charge uniformly distributed over its surface. What is the electric flux through an area of x₃ m² of a spherical surface concentric with the shell of charge but having a radius of x₄ m?

x₁, x₂, x₃, and x₄ are some numbers.
Answer: 8.99∙10⁴∙ x₂ ∙ x₃ / x₄² N∙m²/C

Monday, May 25, 2015

Escape Velocity

What is the escape velocity of a rocket launched from position A, the center of the three planet system depicted in the figure. Each planet has mass M, radius R, and the distance between the center of any planet and position A is r. 

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