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Questions and Answers
How can you calculate the volume of a mineral using known values?
How can you calculate the volume of a mineral using known values?
volume = mass / density
What is the volume of a mineral with a mass of 25 g and a density of 8.96 g/cm^3?
What is the volume of a mineral with a mass of 25 g and a density of 8.96 g/cm^3?
volume = 25 g / 8.96 g/cm^3 = 2.79 cm^3
How can you calculate the distance of a race track using speed and time?
How can you calculate the distance of a race track using speed and time?
distance = speed * time
What is the distance of a race track if a racecar is going 125 mph and it takes 15 minutes to complete a lap?
What is the distance of a race track if a racecar is going 125 mph and it takes 15 minutes to complete a lap?
How can you calculate the force exerted by a book on a table using pressure and area?
How can you calculate the force exerted by a book on a table using pressure and area?
What is the force exerted by a book on a table if it exerts 2 pounds of pressure over 1 ft^2?
What is the force exerted by a book on a table if it exerts 2 pounds of pressure over 1 ft^2?
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Study Notes
Determining a Missing Value
- Determining unknown values from known ones is a valuable skill in science, commonly used in data collection and analysis.
- You can calculate a missing value using simple mathematic relationships, as long as you know the other values.
Simple Algebra
- To determine a missing value in an equation, you need to know the formula and have all the known values on the same side of the equation.
- You may need to reorganize the formula to get the known values together.
- Example: If you have the equation 2 + x = 5, you subtract 2 from each side to get x = 3.
Real-World Applications
- If you know the density and mass of an object, you can calculate its volume using the formula: density = mass / volume.
- Example: Copper chunk with density 8.96 g/cm^3 and mass 25 g, the volume is calculated to be 2.79 cm^3.
- If you know the speed and time of an object, you can calculate its distance using the formula: distance = speed * time.
- Example: Racecar with speed 125 mph and time 15 minutes, the distance is calculated to be 31.25 miles.
- If you know the pressure and area of an object, you can calculate its force using the formula: force = pressure / area.
- Example: Book with pressure 2 pounds/1 ft^2, the force is calculated to be 2 pounds/ft^2.
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