To find amplitude, measure a: the horizontal distance between consecutive crest positions b: the horizontal distance between a consecutive crest and trough c: the vertical distance from a crest to a trough d: the vertical distance from a crest to the rest positionnever mind, use this for free points. i already answered it.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Which of the following best explains what happens when the kinetic energy of particles in a liquid state decreases?

In an exothermic chemical reaction the energy gained by the surroundings must be the energy lost by the reaction