concept: calculating density
what is the density of a plastic ball that has a volume of 6 cm³ and a mass of 12 g?
guess information
g: given
u: unknown
e: equation
s: substitute
s: solution
s: summarize
density a physical or chemical property? why?
is density qualitative or quantitative? why?
concept: measuring weight using a triple beam balance
measure the mass of the given object using the triple beam balance:
reading values
hundreds
tens
ones
total

Question

Accepted Answer

### Part 1: Calculating Density
# Explanation:
## Step1: Recall the density formula
The formula for density ($D$) is $D=\frac{m}{V}$, where $m$ is mass and $V$ is volume.
## Step2: Substitute the given values
Given $m = 12\,\text{g}$ and $V=6\,\text{cm}^3$, substitute into the formula: $D=\frac{12}{6}$
## Step3: Solve for density
$\frac{12}{6}=2$
## Step4: Summarize
The density is calculated by dividing mass by volume, resulting in $2\,\text{g/cm}^3$.
# Answer:
The density of the plastic ball is $2\,\text{g/cm}^3$.

### Part 2: Density as a Physical or Chemical Property
# Brief Explanations:
Density is a physical property because it can be measured without changing the substance's chemical identity (e.g., a plastic ball's density is determined by mass/volume, no chemical reaction occurs).
# Answer:
Density is a physical property. It can be measured without altering the chemical composition of the substance.

### Part 3: Density as Qualitative or Quantitative
# Brief Explanations:
Density is quantitative because it is expressed as a numerical value (e.g., $2\,\text{g/cm}^3$) with a unit, representing a measurable quantity.
# Answer:
Density is quantitative. It is expressed as a numerical value (e.g., $2\,\text{g/cm}^3$) that can be measured and compared numerically.

### Part 4: Measuring Mass with Triple Beam Balance
(Note: Since no object is provided with values, here's how to calculate total mass: )
# Explanation:
## Step1: Sum the values from each beam
The total mass is the sum of the values from the hundreds, tens, and ones beams of the triple beam balance. If, for example, hundreds = $0$, tens = $0$, ones = $12$ (for the plastic ball), then:
## Step2: Calculate total mass
Total = Hundreds + Tens + Ones. For the plastic ball, if hundreds = $0$, tens = $0$, ones = $12$, total = $0 + 0+ 12=12\,\text{g}$ (matches the given mass).
# Answer:
To find the total mass, add the values from the hundreds, tens, and ones readings. For the plastic ball (mass $12\,\text{g}$), if using a triple beam balance, the total mass would be the sum of the beam readings, e.g., if hundreds = $0$, tens = $0$, ones = $12$, total = $12\,\text{g}$. (Actual values depend on the object's mass and the balance's readings.)

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QUESTION IMAGE

Question

Explanation:

Part 1: Calculating Density

Step1: Recall the density formula

Step2: Substitute the given values

Step3: Solve for density

Step4: Summarize

Answer:

Part 2: Density as a Physical or Chemical Property