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Q. A helicopter is ascending perpendicularly with a speed of 5.02 {rm m/s}. At a height of 115 {rm m} above the Earth, a package is dropped from the window.

How much time does it take for the package to get to the ground? [Hint: v_0 for the package equals the speed of the helicopter.]

Q. Surface of Cube At each point on the surface of cube, the electric field is in the positive direction of z. The length of each edge of the cube is 2.20 m. On the top surface of the cube, = (-33 N/C)k, and on the bottom face of the cube = (+19 N/C)k . Conclude the net charge contained within the cube.

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