Knowing that the mass of the moon is 1/80 of the mass of the Earth and it’s Radius is ¼ of the radius of Earth. Determine the gravity on surface of the moon and the weight of the person knowing it has a mass of 80Kg.

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Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers