Can you open this simple padlock puzzle? #shorts

Can you suggest simple name to the process of RNA to DNA synthesis ?

What do you mean by simple harmonic motion ?

How will you define length of the simple pendulum ?

The chest is locked by a number of padlocks. All padlocks must be unlocked in order to open the chest. 12 Copies of the keys to the padlocks are distributed lie next to it, such that any group of 7 or more keys can open the chest should they choose to do so, but any group of less than 7 cannot. What is the minimal number of padlocks required to achieve this?

When you open the door for a person visiting you, this behaviour can be considered as