A spaceship is measured to be 120 m long while it is at, Ask an Expert

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Q. A spaceship is measured to be 120 m long while it is at rest with respect to an observer. If the spaceship now flies past the observer with a speed of .99c, what length will the observer measure of the spaceship?

Q. Calcula Two 4.0 cm x 4.0 cm electrodes spaced 2.0 mm apart form a parallel-plate capacitor. Inside the capacitor the electric field strength is 2.5 x 106 N/C. What is the charge on each electrode?

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