What are the forces like in a collision?

electric field is a function of 1/r^2

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

the given statement is true.

sensory memory lasts for a fraction of seconds before the information is lost. it is the shortest -term memory and can be called as an element of memory. example: when we look at something and remember what it looks like, is just a second of observation. it degrades very quickly. it can also be considered as the process of perception rather than considering it as a memory.