Take the density of the crown to be rhocrhocrho_c. What is the ratio of the crown's apparent weight (in water) WapparentWapparentW_apparent to its actual weight WactualWactualW_actual? Express your answer in terms of the density of the crown rhocrhocrho_c and the density of water rhowrhowrho_w.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

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