What happens when a plastic lid sprinkled with iron filings is placed over a magnet?

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.

Positive ions differ from neutral atoms in that