How many pounds does 31.8 in3 of gold weigh? (The density of gold is 19.3 g/cm3, 2.54 cm = 1 in, and 454 g = 1 lb.)

Question

How many pounds does 31.8 in³ of gold weigh? (The density of gold is 19.3 g/cm³, 2.54 cm = 1 in, and 454 g = 1 lb.)

Answer 1

So Gabs S., how should you go about converting data in in^3 units into data in kg? Suggest you consider using the density, and the other English->metric conversion factors given. Remember to always keep the units together with any conversion factor. So, for example, you might multiply by: (1 in/2.54 cm) as a conversion factor -- although your number value will change, so will the units. You have not changed anything physical in your problem when you do that, you are only switching units properly. And you will get LOTS of practice in switching units in your science and math courses, believe me.

-- Cheers, --Mr. d.

P.S. By the way, this is probably the closest you'll ever get to ~10 kg of gold. Savor the experience!