Aglass marble is rubbed against a piece of silk. as a result the piece of fabric acquires extra electrons. what happens to the glass marble? check all that apply. view available hint(s) check all that apply. the marble has lost the same number of electrons acquired by the piece of silk. the marble has acquired the same number of electrons acquired by the piece of silk. the marble acquires a positive charge and repels the piece of silk. the marble acquires a positive charge and attracts the piece of silk. the marble acquires a negative charge and attracts the piece of silk. the marble acquires a negative charge and repels the piece of silk. submit

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.