1.3.2 Working on compound units as speed, density, pressure

• What does the unit of volume measure?

  Amount of space occupied
• Match the unit category with its corresponding measurement:

  Length ↔️ Distance

  Mass ↔️ Weight

  Volume ↔️ Amount of space occupied

  Time ↔️ Duration
• What does 'distance' refer to?

  The length traveled
• What does 'speed' measure?

  How fast an object moves
• Compound units measure things like speed, density, and pressure

  True
• What is the formula for speed?

  $speed =$$\frac{distance}{time}$
• The symbol for seconds is 's'.

  True
• What is the basic unit of length?

  Meters
• 1 mph is approximately 0.44704 m/s


  True
• What is 60 mph in m/s?

  26.82 m/s
• What is the abbreviation for Newtons per square meter?

  N/m²
• What is 'time' in the context of speed calculation?

  The duration to cover distance
• What does density measure?

  How much "stuff" is packed
• What is the unit for density?

  kg/L or g/cm³
• 1 Pascal is equal to 1 N/m²

  True
• Pressure is calculated by dividing force by area.

  True
• What is 500 Pa in N/m²?

  500 N/m²
• What is the unit for force?

  Newtons
• The formula for density is $density =$$\frac{mass}{volume}$


  True
• What is the formula for calculating pressure?

  $pressure =$$\frac{force}{area}$
• What is the formula for calculating density?

  $density =$$\frac{mass}{volume}$
• Match the density units with their full names:

  kg/L ↔️ kilograms per liter

  g/cm³ ↔️ grams per cubic centimeter
• If 500 N of force is applied over an area of 2 square meters, the pressure is 250 Pa.


  True
• Pressure is calculated by multiplying force and area.

  False
• A rock with a mass of 500 grams and a volume of 250 cubic centimeters has a density of 2 g/cm³

  True
• Match the term with its definition:

  Pressure ↔️ Force per unit area

  Force ↔️ A push or pull

  Area ↔️ The size of the surface
• 1 kg/L is equal to 1 g/cm³

  True
• To calculate density, you divide mass by volume.

  True
• Miles per hour (mph) is a common unit for speed

  True
• What does understanding the units for speed, density, and pressure help you do?

  Interpret and compare measurements
• Why is it important to convert between compound units?

  For consistency and comparison
• What is the equivalent of 1 km/h in m/s?

  0.27778 m/s
• What should you know to solve problems involving compound measures?

  Common units
• If a car travels 200 kilometers in 4 hours, its speed is 50 km/hr


  True
• What is 5 kg/L in g/cm³?

  5 g/cm³
• What is the abbreviation for kilometers per hour?

  km/h
• Different units are used depending on the context

  True