If an object straight downfalls 30m in 2sec, how far will falls in 4 sec a. tailwind b. headwind​

second mirror gathers light from a faraway object and reflects it to another mirror. - a.

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.