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Q. How much positive charge and how much negative charge are on the protons and electrons in a cup of water (0.25kg)? What is the magnitude of attractive force exerted by the electrons in the cup of water on the protons in a second cup of water 10m away?

Q. A rocket is launched at an angle of 51.0° above the horizontal with an initial speed of 104 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. At this time, its engines fail and the rocket proceeds to move as a projectile.

(a) Find the maximum altitude reached by the rocket.
(b) Find its total time of flight
(c) Find its horizontal range.

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