density

What is the unity for density?

• kilogram per cubic meter

• kilograms per square meter
• grams per cubic centimeter
• liters per kilogram

What is the mass of 25cm³ of a liquid if it has a Denisty of 5 g/cm³

Answer explanation

Remember the equation ρ= m/v

when you rearrange the equation for mass you get m= ρv

Why do helium balloons float?

• helium is less dense than air

• helium is cooler than air

• helium is more dense than air

• helium is warmer than air

This rectangular prism has a height of 3 cm, a width of 5 cm an length of 7cm. It weighs' 100 grams. What is it's density?

Answer explanation

The equation for density is ρ= m/v

The height is 1.5 m, the length 1m and the width 2.5m. The mass is 10kg. Find the density

d= 1.5 m and h= 5.5 m. The mass is 0.75 kg. What is the density of this cylinder?

Answer explanation

The volume of a cylinder is calculated as V=π r² h. using that the volume is 9.72. then using the formula for density the answer will be .0772 kg/m3