At 18◦c, an aluminum ring has an inner diameter of 2 cm and a brass rod has a diameter of 2.07 cm. if the temperature coefficient of expansion for brass is 1.9 × 10−5 ( ◦c)−1 and the temperature coefficient of expansion for aluminum is 2.4 × 10−5 ( ◦c)−1,to what temperature must the ring be heated so that it will just slip over the rod? answer in units of ◦c.

idk sorry i only needs point for apex

explanation:

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. the material that loses electrons is left with a positive charge.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.