Verified answer

Since when are there questions about "engineering" in elementary school...?

2. The volume of a rectangular prism is thickness * width * length

Mass is volume * density

Now careful with units... that mass is going to be in grams so divide with 1000 to get kg.

Multiply by 5 and then multiply by g (9.81 m/s^2)

1. Yes things denser than the liquid sink and less dense things float. No matter the depth.

6. Okay planes have lift. Rockets have thrust.

Pretty sure the rest are just as easy.

https://imgur.com/a/Cv8VTTH These are he questions