A glass beaker containing a sample of water is in a calorimeter. The beaker has a mass of 0.200 kg and the water has a mass of 1.15 kg. Both the beaker and water are at a temperature of 14.0°C. You drop a piece of steel with a mass of 0.405 kg at 225°C into it. After some time, the sizzling subsides and the system reaches an equilibrium temperature. (Make the reasonable assumptions that any steam produced condenses into liquid water during the process of equilibration and that the evaporation and condensation don't affect the final temperature.)

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?