A .40 kg copper miniature of the Eiffel Tower your grandma gave you for Christmas is cooled from 22°C to 0°C because you forgot to take the ugly gift out of the car. If the Cp of copper is 380 J/kg·C°, what is the change in thermal energy?

Atomic nuclei of almost all elements consist of

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?

Ways that industry and agriculture use physical properties to separate substances