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Chapter 1: Problem 6

Density of water is ________ than the density of cooking oil.

Short Answer

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"Density of water is _______ than the density of cooking oil." Answer: greater

Step by step solution

01

Define Density

Density is a physical property of a substance, defined as its mass per unit volume. It is usually represented by the Greek letter 'rho' (蟻) and expressed in units of kilograms per cubic meter (kg/m鲁) or grams per cubic centimeter (g/cm鲁). The formula for density is: 蟻 = mass/volume
02

Compare Densities of Water and Cooking Oil

To compare the densities of water and cooking oil, we will look at their respective values in the standard measurement unit. Density of water at room temperature (25掳C) is approximately 0.997 g/cm鲁 or 997 kg/m鲁. Density of cooking oil (vegetable oil) varies depending on the type of oil, but it is usually less dense than water. For example, the density of canola oil at room temperature is approximately 0.91 g/cm鲁 or 910 kg/m鲁.
03

Determine the Relationship Between the Densities

After comparing the densities of water and cooking oil: Density of water = 0.997 g/cm鲁 Density of cooking oil (canola oil) = 0.91 g/cm鲁 Since the density of water (0.997 g/cm鲁) is greater than the density of cooking oil (0.91 g/cm鲁), we can conclude: Density of water is "greater" than the density of cooking oil. So, the correct statement to fill in the blank is: "Density of water is greater than the density of cooking oil."

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Key Concepts

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

Mass Per Unit Volume
Density is a key physical property that helps us understand substances better. It measures how much mass a substance holds within a certain volume. When we say "mass per unit volume," we are describing how densely packed the particles of a substance are in a given space.
To calculate density, we use the formula:
  • \( \rho = \frac{\text{mass}}{\text{volume}} \)
Here, \( \rho \) is the density, and it tells us how heavy or light a substance is for a specific size. The units for density are typically kilograms per cubic meter (kg/m鲁) or grams per cubic centimeter (g/cm鲁). Understanding mass per unit volume is crucial because it allows us to compare different materials easily.
Density of Water
Water is often used as a benchmark for density comparisons due to its familiar physical properties. At room temperature, the density of water is approximately 0.997 g/cm鲁. This consistency makes it a handy reference point in experiments and calculations.
Water鈥檚 density can vary slightly with temperature and pressure, but under standard conditions, it remains relatively stable.
  • At 0掳C, water's density is slightly higher, approximately 1 g/cm鲁.
  • At 4掳C, water reaches its maximum density, again close to 1 g/cm鲁.
This peculiar property of water being densest at 4掳C, among many others, plays a significant role in aquatic life and environmental sciences.
Density Comparison
Comparing the density of two substances helps us predict how they interact. When you compare the densities of water and cooking oil, you find that water is slightly more dense.
  • Density of water: 0.997 g/cm鲁
  • Density of cooking oil (e.g., canola oil): 0.91 g/cm鲁
Because water is denser, it will support the lighter oil on its surface. This property explains why oil floats on water, creating layers when the two substances are mixed. In practical terms, chefs see this phenomenon when making vinaigrettes, observing that oil needs to be whisked or shaken with vinegar/water to form a temporary solution before it separates again.
Physical Properties of Substances
Physical properties describe the observable characteristics of substances. Density, color, melting point, boiling point, and solubility are all examples of physical properties.
Density, specifically, offers insight into many physical behaviors of a substance:
  • Floating or sinking in water
  • Buoyancy
  • Structural strength
These properties are intrinsic to each material and remain unchanged regardless of how much of the substance you have. Understanding these properties, particularly density, is crucial in fields like material science, chemistry, and engineering because they impact how we use materials in construction, design, and everyday life.

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Most popular questions from this chapter

Name the device used to measure the volume of an irregular solid.

The mass of a body of weight 200 gf is _____ \(\mathrm{g}\). (1) \(\quad 200\) (2) \(\quad 300\) (3) 400 (4) \(\quad 20\)

Match the entries given in column A with the appropriate ones in column \(B\). $$ \begin{array}{l} \text { - }\\\ \begin{array}{ll} \hline {\text { Column A }} & {\text { Column B }} \\ \hline \text { A. Science } & \text { ( ) a. Gravitational pull by Earth } \\ \text { B. The volume of cube of side 'S' } & \text { ( ) b. Due to convection current } \\ \text { C. CGS unit of temperature } & \text { ( ) c. The atoms packed within the substance } \\ \text { D. Density of liquid } & \text { ( ) d. Latin word "Scire" } \\ \text { E. Weight } & \text { ( ) e. } \mathrm{S}^{3} \\ \text { F. Liquids heat up } & \text { ( ) } \mathrm{f.} \quad \frac{\text { Mass of liquid of volume } \mathrm{V}}{\text { Mass of water of same volume } \mathrm{V}} \\ \text { G. The difference in densities of substances } & \text { ( ) g. Degree centigrade }\left({ }^{\circ} \mathrm{C}\right) \end{array} \end{array} $$

When half of the total volume of an empty beaker of mass \(100 \mathrm{~g}\) is filled with water, its mass is found to be \(500 \mathrm{~g}\) and when the remaining volume of the beaker is filled with a liquid, its mass is found to be \(1 \mathrm{~kg}\). Calculate the density of the liquid.

The smallest measurement that can be measured by using a wall clock is ______. (1) 1 second (2) 1 minute (3) 1 hour (4) 2 second
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