(this is for science, not physics.) a neutral atom of potassium (k) has an average mass of 39 amu and 19 electrons. how many neutrons does it have? a) 10 b) 19 c) 20 d) 58

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

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?

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.