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an object of the same mass has three different weights at different times. which statement is possible?
the object gains matter and then loses it.
the object started on earth, was transported to space, and was deposited on the moon.
the object started at the bottom of a hill, then moved to the top of the hill, and then moved back down to the bottom of the hill.
the object changes shape, which changes its weight.

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c