Find the direction (in degrees counterclockwise from the +x-axis) and magnitude (in N) of Ftot the total force exerted on her by the others, given that the magnitudes F1 and F2 are 21.6 N and 15.8 N, respectively. (Assume F1 points in the positive x direction.)

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?

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?

Which family/group are gases at room temp. !