A cylinder has a circular cross section with a radius of \(2.500 \mathrm{~cm}\). What is the volume of water in the cylinder with a measured height of \(1.20 \mathrm{~cm}\) ? (The volume of a cylinder is \(\pi r^{2} h\), where \(r\) is the radius and \(h\) is the height.)

Short Answer

Expert verified
Answer: The volume of water in the cylinder is approximately 23.562 cm³.

Step by step solution

01

Identify the given values

The problem provides us with the radius \(r = 2.5 \mathrm{~cm}\) and the height \(h = 1.2 \mathrm{~cm}\).
02

Write down the formula for the volume of a cylinder

The formula for the volume of a cylinder is: \(V = \pi r^2 h\), where \(V\) is the volume, \(r\) is the radius, and \(h\) is the height.
03

Plug in the given values

Now, we will substitute the given values for the radius and height into the formula: \(V = \pi (2.5)^2 (1.2)\).
04

Calculate the volume

Perform the calculations in the formula to find the volume of water in the cylinder: \(V = \pi \cdot 6.25 \cdot 1.2 = 7.5\pi \approx 23.562 \mathrm{~cm^3}\).
05

Present the answer

The volume of water in the cylinder with a radius of \(2.5 \mathrm{~cm}\) and a height of \(1.2 \mathrm{~cm}\) is approximately \(23.562 \mathrm{~cm^3}\).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Geometric Formulas
Geometric formulas are essential tools for solving problems involving shapes and spaces. These formulas allow us to calculate various properties of geometric figures, such as area, volume, and surface area. In our case, working with a cylinder, we need to understand how its dimensions relate to its volume. A basic geometric principle for cylinders tells us that the volume is directly related to two main components: the area of its circular base and its height.

Understanding geometric formulas is not only instrumental in mathematics but also in practical applications, such as in constructing everyday objects and in scientific measurements. Thus, having a solid grasp of these formulas means we can navigate real-world scenarios effectively.
Cylinder Volume Calculation
Calculating the volume of a cylinder is relatively straightforward. The formula provided V = \(\pi r^2 h\), where \(V\) represents volume, \(r\) radius, and \(h\) height, expresses this mathematical relationship. To compute the volume, one must first square the radius of the cylinder's base, multiply it by \(\pi\), the constant representing the ratio of a circle's circumference to its diameter, and then multiply this product by the cylinder's height.

Visualization of the Calculation

Imagine piling up a series of circles (the base of the cylinder) equal to the height of the cylinder. By doing this, you can visualize how the area of the base and the height together determine the total volume of the cylinder. The visualization can serve as a helpful mnemonic device for remembering this formula—essentially, the volume of a cylinder is just the area of the base multiplied by the height.
Mathematics in Chemistry
Mathematics is a foundational component in the field of chemistry, particularly when dealing with measurements and quantities of substances. Chemists frequently use mathematical concepts, like the volume of a cylinder, when working with liquids in laboratory settings. Knowing the precise volume of substances is vital for conducting experiments, as many chemical reactions depend on accurate measurements of reactants.

In our exercise, the cylinder could represent a graduated cylinder used in a chemistry lab to measure the volume of a liquid. By applying the cylinder volume calculation, we can accurately determine how much of a chemical is present or required for a reaction. This reinforces the importance of mathematical precision in scientific inquiry, underpinning how deeply interconnected mathematics is with the empirical sciences such as chemistry.

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Most popular questions from this chapter

The unit of land measure in the English system is the acre, while that in the metric system is the hectare. An acre is \(4.356 \times 10^{4} \mathrm{ft}^{2} .\) A hectare is ten thousand square meters. The town of Willington in Connecticut requires a minimum area of \(2.0\) acres of land for a single-family dwelling. How many hectares are required?

A waterbed filled with water has the dimensions \(8.0 \mathrm{ft} \times 7.0 \mathrm{ft} \times\) \(0.75 \mathrm{ft}\). Taking the density of water to be \(1.00 \mathrm{~g} / \mathrm{cm}^{3}\), how many kilograms of water are required to fill the waterbed?

Lead has a density of \(11.34 \mathrm{~g} / \mathrm{cm}^{3}\) and oxygen has a density of \(1.31 \times 10^{-3} \mathrm{~g} / \mathrm{cm}^{3}\) at room temperature. How many \(\mathrm{cm}^{3}\) are occupied by \(1 \mathrm{~g}\) of lead? By \(1 \mathrm{~g}\) of oxygen? Comment on the difference in volume for the two elements.

Gallium is one of the few metals that can melt at room temperature. Its melting point is \(29.76^{\circ} \mathrm{C}\). If you leave solid gallium in your car on an early summer morning when the temperature is \(75^{\circ} \mathrm{F}\), in what physical state is the gallium when you return to your car and the interior car temperature is \(85.0^{\circ} \mathrm{F} ?\)

Round off the following quantities to the indicated number of significant figures. (a) \(7.4855 \mathrm{~g}\) (three significant figures) (b) \(298.693 \mathrm{~cm}\) (five significant figures) (c) \(11.698 \mathrm{lb}\) (one significant figure) (d) \(12.05 \mathrm{oz}\) (three significant figures)

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