Los centros de dos pequeñas esferas metálicas con carga de 7.4×10−8 C están a 10 cm uno de otro. a) ¿Cuál es la fuerza eléctrica entre ellas? b) Una de las esferas se toca con otra idéntica neutra, ¿cuál es ahora la fuerza eléctrica si se mantienen a la misma distancia? La constante en la expresión de la ley de Coulomb es k=9.0×109 Nm2C2.

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.