In the figure below Q₁ (+ 3 µC), Q₂ (−6 µC) and Q3 (+ 2 µC). Q3 X=0 F2-1 Q1 x=3cm x 4cm The free body diagram of Q₁ from Part 1 should have looked like this. Q₁ F3-1 Calculate the net force on Q₁. Q2 X

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Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.