two boys of masses 30 kg and 45 kg sits at the end a and b respectively of an adjnotable see saw of lengjt 10cm find the distance from the end B that the see saw must be pivoted so that the two ways will maintain a balance of the weight of the see saw is disregarded

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

What is the technical name for super glue type adhesives?

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr