A 4 m long, 500 kg uniform steel beam extends horizontally from the point where it is attached to a wall. A 70 kg construction worker stands on the far end of the beam. The system is in static equilibrium. What is the magnitude of the torque exerted by the wall on the beam

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

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?