Checkpoint 3 Physics

How do you convert kg/m³ to g/cm³?

• multiply by 1000

• divide by 1000

• multiply by 100

• divide by 100

Steel has a density of 7900 kg/m³, mercury 13500kg/m³. What happens if a steel ball was placed on mercury?

• The ball sinks

• The ball floats

• The ball accelerates forward

Steel has a density of 7900 kg/m³ & Aluminium has 2700 kg/m³. Which is heavier 1m³ of Steel or 1m³ of Aluminium?

• Steel

• Aluminium

• Both are same

The mass of a block was 88.4 g. The original volume of water in the measuring cylinder was 50 cm³, the combined volume of block and water was 84 cm³. What is the density of the block?

• 1.76 g/cm³

• 2.60 g/cm³

• 3.45 g/cm³

• 4.42 g/cm³

Most people can float on water, what does this say about the density of human body?

• human body is less dense than water

• water is less dense than human body

What is 1 N/m² also called as?

Which exerts more pressure A or B?

• A

• B

• Both

Drivers in iceland let their tyres soft while driving on snow. Why?

• to increase pressure for better grip

• to lower the pressure so they dont sink

Which of the following is NOT a use of increasing pressure?

• Studs

• Pins & Spikes

• Knives

• Skies

Calculate the force exerted on the bigger piston.

• 0.1 N

• 10 N

• 100 N

• 1000 N