Question

If butter has an energy density of 10 cal per gram and has a density of .9 g/cm³ what would be the amount of calories in nook cube of butter that is 5 cm x 5 cm x 20 cm

Answer 1

Amount of calories in that butter is 4500cal

Step-by-step 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.