Calculate the efficiency of an appliance that has a power rating of 7w but takes 42 seconds to transfer 183 joules of useful energy

i think the answer is tomato juice? not entirely sure though

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.