Answer:early models of telephones were used with a twirl of numbers
Explanation:
Not advanced technology
Answer:
When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. The material that gains electrons becomes negatively charged
Explanation:
thank me later
Hydrogen, hydrogen ion (H+) is associated with acids
