Density and Moment

What is the anticlockwise moment acting on this crane?

• 80,000Nm
• 100,000Nm
• 120,000Nm
• 140,000Nm

Tags

NGSS.HS-PS2-1

What is the moment produced by the 15 N?

• 15 Ncm (clockwise)

• 150 Ncm (anti - clockwise)

• 1500 Nm (anti - clockwise)

• 0.15 Ncm (clockwise)

Why do objects sink or float in H₂O? 

• Because their densities are higher or lower than compared to water
• Because their densities are using gravity to pull down
• Because their densities are heavier or lighter
• Because their mass and volumes are equal 

Why do ice cubes float in a  glass of water?

• the ice cubes are more dense than the water
• the water is more dense than the ice cubes
• the water is more dense than the glass
• the ice is more dense than the glass

What is this tool to get volume?

• triple beam balance
• ruler
• thermometer
• graduate cylinder

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

Tags

CCSS.HSG.MG.A.2

Frank has an eraser. It has a mass of 4 g, and a volume of 2 cm³. What is its density?

• 8 g/cm³
• 2 g/cm³
• 1/2 g/cm³
• 24 g/cm³

Tags

NGSS.MS-PS1-2

Calculate the density of the cube.

• 2 g/cm³
• 4 g/cm³
• 6 g/cm³
• 8 g/cm³

A moment is...

• a force measured in Newtons

• a turning force measured in newton metres

• a distance measured in metres

• a time intervals measured in clicks

What is the volume of the rock?

• 30cm³
• 10cm³
• 40cm³
• 20cm³