Physics Problem on Pendulum

A car travels at constant speed for the time t₁ from the city A to the city B.

A car travels at constant speed for the time t₁ from the city A to the city B. Another car starts the movement simultaneously with the first car. This car travels at a constant speed for the time t₂ from the city B to the city A and uses the same road. How much time  it take for the cars to meet each other?

Physics

Physics

Mu-mu | Soviet animated film

Waiting for waves and particles

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

SI Prefixes

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A photo posted by Vasiliy S. Znamenskiy (@znamenski) on Dec 5, 2015 at 12:13pm PST