Suppose that a negatively charged balloon is used to charge an electroscope by induction. The procedural steps are described in the educational cartoon below. On the cartoon, draw the orientation of the needle and indicate the location and type of any excess charge in steps ii. - v. Explain in terms of electron movement what is happening in each step.

Which of the following is a source of heat for magma formation? magma plumes in the continental crust friction due to divergence friction due to subduction magma plumes in the oceanic crust

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".