(a) Explanation Given info: the percentage of water in biological tissue is 98 % . The density of water is 1.0 × 10 3 kg/m 3 . Formula to calculate the mass of the heart is, m = ρ × V m is the mass of the heart. ρ is the density of the heart. V is the volume of the heat. Assume the shape of the heart is spherical and the diameter of the heart is 13 cm . Formula to calculate the volume of the heart is, V = 4 3 π ( d 2 ) 3 d is the diameter of the heart. Substitute ( 4 3 π r 3 ) for V to find m . m = ρ × 4 3 π ( d 2 ) 3 Substitute 1 (b) To determine The mass of a cell. (c) To determine The mass of honeybee.

13th Edition

ISBN: 9781269542661

Author: YOUNG

Publisher: PEARSON C

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Density of Solids

The density of a substance refers to how much matter is present in a given amount of space. It is expressed as the ratio of the mass of the substance to its volume.

Question

Chapter 1, Problem 1.56P

(a)

To determine

The mass of the heart of adult human.

(b)

To determine

The mass of a cell.

(c)

To determine

The mass of honeybee.

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Chapter 1, Problem 1.55P

Chapter 1, Problem 1.57P

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Biological tissues are typically made up of 98% water. Giventhat the density of water is 1.0 * 103 kg/m3, estimate the mass of (a) theheart of an adult human; (b) a cell with a diameter of 0.5 mm; (c) a honeybee.

L (a) The heart pumps blood into the aorta at a rate of 4 the aorta's diameter is 2.1 cm. Calculate the average speed of blood if min V blood = cm S (b) The aorta branches many times until the blood finally reaches the smallest branch: the capillaries. Each capillary has an average diameter of 6.9 μm and the blood slows down to 0.5 the number of capillaries in the body. Does this answer look reasonable? mm Calculate . S n = caps capillaries (c) For what duration of time is a red blood cell in a capillary if the average capillary length is 1 mm? t = (d) Why does the blood need to flow much slower through the capillaries than the aorta? ○ A. The capillaries are thin and might burst. ○ B. There must be sufficient time for the exchange of substances to occur across the cell membrane of the capillaries. O C. There is a smaller cross-sectional area. ○ D. None of these.

Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold, with a mass of 27.63 g, is pressed into a leaf of 1.000 mm thickness, what is the area of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.500 mm, what is the length of the fiber?

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The mass of the heart of adult human.

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The mass of the heart of adult human.

The mass of a cell.

The mass of honeybee.

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Chapter 1 Solutions