Alguien puede traducirlo?: What's the fastest animal in the world?
Answer (2)
Convert volume to mL: 1817 c m 3 = 1817 m L .
Convert mass to grams: 1.62 k g = 1620 g .
Calculate density: d e n s i t y = v o l u m e ma ss = 1817 m L 1620 g ≈ 0.892 g / m L .
Identify the liquid: The density matches tetrahydrofuran. t e t r ah y d ro f u r an
Explanation
Problem Analysis We are given the volume of an unknown liquid as 1817 c m 3 and its mass as 1.62 k g . We need to find the density of the liquid and identify it from a list of possible liquids.
Volume Conversion First, we need to convert the volume from c m 3 to m L . Since 1 c m 3 = 1 m L , the volume is 1817 m L .
Mass Conversion Next, we convert the mass from k g to g . Since 1 k g = 1000 g , the mass is 1.62 k g × 1000 g / k g = 1620 g .
Density Calculation Now, we calculate the density using the formula: d e n s i t y = v o l u m e ma ss = 1817 m L 1620 g ≈ 0.8915795266923501 g / m L
Rounding We round the density to 3 significant digits, which gives us 0.892 g / m L .
Identification Comparing this value to the given densities, we see that it is closest to tetrahydrofuran, which has a density of 0.89 g / m L .
Examples
Density is a fundamental property of matter that helps us identify substances. For example, knowing the density of gold helps us distinguish it from other metals. In the kitchen, we use density when we observe oil floating on water, because oil is less dense than water. Understanding density is crucial in many fields, from cooking to construction, helping us predict how materials will behave and interact.
The fastest animal in the world is the peregrine falcon, which can reach speeds of over 240 miles per hour during its hunting dive. It is a widely distributed bird found across various habitats globally, and conservation efforts have helped its population recover. The falcon employs its speed to hunt effectively, primarily targeting other birds mid-air.
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