Hello! I need your help

I have a friend who is in 5th grade, she doesn't know what force and motion is I wanna make her like a help page?

Can someone help me put stuff into the sheet?

On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?

What is the equation for electrical work?

How does an observation about an object differ from an inference about that object