in your own words, explain protein synthesis as if you were explaining it to a 5 years old sibling. keep it simple

When the cells of your body want to make protein, they follow a recipe. Protein synthesis is a term that means making protein. The recipe for protein synthesis uses ingredients like mRNA, tRNA, and amino acids as well as a special piece of equipment called a ribosome.

Explanation:

it is the process of making protein molecules

Amount of calories in that butter is 4500cal

Explanation:

It's relatively simple:

You already have energy density(energy divided by mass)

You already have butter density (mass divided by volume)

And you have dimensions of that butter

From those dimensions (5cmx5cmx20cm) you can calculate the volume, which is 500cm³. Then, using that volume you can calculate the mass (density = mass / volume, which means that mass = density * volume) and that is 450g. Now that you have the mass, you can calculate the amount of calories in that butter (energy density = energy/mass, which means that energy = mass * energy density) and that is 4500cal.