Several pith balls are suspended by nylon string of negligible mass. ball b is negatively charged. ball a attracts ball b. ball a repels ball c. which statement about the charges on the other balls is true? a) ball a is negatively charged. b) ball a is neutral. c) ball c is positively charged. d) ball c is neutral.

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

Drag each item into the proper state of matter category.

The scalar triple product computes the magnitude m of the moment of a force vector f about a specified line. it is m = (r × f) · n, where r is the position vector from the line to the point of application of the force and n is a unit vector in the direction of the line. use matlab to compute the magnitude m for the case where f = [12, −5, 4] n, r = [−3, 5, 2] m, and n = [6, 5, −7].