Math Problem Statement

A hollow cylinder with the bottom end closed off is filled with 5.00 mL of water. The height of the water in the cylinder is 57.0 mm. How much will height of the liquid change after 277 microliters of water added.

Solution

We are tasked with finding how much the height of the liquid will change after 277 microliters (μL\mu L) of water is added to the cylinder.

Given:

  • Volume of water initially: V1=5.00mL=5000μLV_1 = 5.00 \, \text{mL} = 5000 \, \mu L
  • Initial height of water: h1=57.0mmh_1 = 57.0 \, \text{mm}
  • Volume of water added: ΔV=277μL\Delta V = 277 \, \mu L

Step 1: Calculate the cross-sectional area of the cylinder

The height h1h_1 and the volume V1V_1 are related by the formula for the volume of a cylinder: V1=A×h1V_1 = A \times h_1 Where:

  • AA is the cross-sectional area of the cylinder (constant),
  • h1h_1 is the height of the liquid,
  • V1V_1 is the volume of the liquid.

Rearranging the formula to solve for AA: A=V1h1A = \frac{V_1}{h_1}

Substitute the known values (V1=5000μLV_1 = 5000 \, \mu L and h1=57.0mmh_1 = 57.0 \, \text{mm}): A=5000μL57.0mm=5000mm357.0mm87.72mm2A = \frac{5000 \, \mu L}{57.0 \, \text{mm}} = \frac{5000 \, \text{mm}^3}{57.0 \, \text{mm}} \approx 87.72 \, \text{mm}^2

Step 2: Calculate the change in height

The new volume of water after adding 277 μL\mu L will be: V2=V1+ΔV=5000μL+277μL=5277μLV_2 = V_1 + \Delta V = 5000 \, \mu L + 277 \, \mu L = 5277 \, \mu L

The change in height Δh\Delta h is given by the relation: Δh=ΔVA\Delta h = \frac{\Delta V}{A}

Substitute ΔV=277μL=277mm3\Delta V = 277 \, \mu L = 277 \, \text{mm}^3 and A=87.72mm2A = 87.72 \, \text{mm}^2: Δh=277mm387.72mm23.16mm\Delta h = \frac{277 \, \text{mm}^3}{87.72 \, \text{mm}^2} \approx 3.16 \, \text{mm}

Final Answer:

The height of the liquid will increase by approximately 3.16mm3.16 \, \text{mm}.


Would you like more details or have any questions about the steps? Here are some related questions:

  1. How does the height change relate to the volume in different shaped containers?
  2. How can we determine the diameter of the cylinder from the cross-sectional area?
  3. What happens if we add 1.00 mL of water instead?
  4. How would the result change if the cylinder were not perfectly vertical?
  5. Can this problem be extended to non-cylindrical containers?

Tip: In physics and geometry problems, knowing how to manipulate formulas is key to switching between volume, area, and height relationships.

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Math Problem Analysis

Mathematical Concepts

Geometry
Volume of Cylinder
Proportional Relationships

Formulas

V = A × h (Volume of a cylinder)
A = V / h (Cross-sectional area of a cylinder)
Δh = ΔV / A (Change in height of liquid)

Theorems

Volume-to-height relationship in cylindrical containers

Suitable Grade Level

Grades 9-12