how much energy does an electron possess in it's ground state if it is placed in a cube of dimension 50nm​

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

Enzymes affect the reactions in living cells by changing the