A particular household uses a 2.2-kW heater 1.5 h/day ("on" time), four 75-W lightbulbs 5.0 h/day , a 2.5-kW electric stove element for a total of 1.0 h/day , and miscellaneous power amounting to 2.3 kWh/day.

a. If electricity costs $0.105 per kWh, what will be their monthly bill (30 days)?

b. How much coal (which produces 7500 kcal/kg) must be burned by a 37 % -efficient power plant to provide the yearly needs of this household?

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .

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?

What type of force holds atoms together in a crystal?