Conceptual Physics: The High School Physics Program
Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Chapter 19, Problem 42A

Suppose you have two life preservers that are identical in size, the first a light one filled with foam and the second a very heavy one filled with lead pellets. If you submerge these life preservers in water, upon which will the buoyant force be greater? Upon which will the buoyant force be ineffective? Why are your answers different?

Expert Solution & Answer
Check Mark
To determine

To identify: The life preserver that will experience greater buoyant force. Also, the life preserver that will experience more effective buoyant force.

Explanation of Solution

Introduction:

Buoyant force:-

Pressure of water increases with depth, therefore pressure on the lower surface of an object is greater than the pressure on upper surface, it means upward force acting on lower surface of object is greater than the downward force acting on the upper surface of object hence a net force acts in upward direction which is known as buoyant force.

As the lead pallets life preserver is having higher density than water so it will sink and not affected by buoyant force and we all know density is directly proportional to the buoyant force and foam is having less density than water so its start floating and buoyant force is decreased on it .

Lead pallet life preserver is having higher density so it will sink and hence buoyant force is ineffective on it because buoyant force on an object which lie at the bottom of water is ineffective.

The sizes of foam and lead pallets preservers are same so both the preserves will displaced same amount of water when they get submerged due to which buoyant force on both of them will be equal. The foam preserver is more effective in comparison to the lead pallets preserver, because foam preserver is lighter due to which it can float.Upon lead pallets preserver buoyant force will be ineffective due to its heavy weight.

Conclusion:

The sizes of foam and lead pallets preservers are same so both the preserves will displaced same amount of water when they get submerged due to which buoyant force on both of them will be equal. The foam preserver is more effective in comparison to the lead pallets preserver, because foam preserver is lighter due to which it can float.Upon lead pallets preserver buoyant force will be ineffective due to its heavy weight.

Chapter 19 Solutions

Conceptual Physics: The High School Physics Program

Ch. 19 - What is the mass of 1 liter of water in kilograms?...Ch. 19 - a. Does the buoyant force on a submerged object...Ch. 19 - When the buoyant force on a submerged object is...Ch. 19 - When the buoyant force on a submerged object is...Ch. 19 - When the buoyant force on a submerged object is...Ch. 19 - Prob. 16ACh. 19 - Does the buoyant force on a floating object depend...Ch. 19 - What is the buoyant force that acts on a 100-ton...Ch. 19 - According to Pascals principle, what happens to...Ch. 19 - When the pressure in a hydraulic press is...Ch. 19 - Calculate the amount of pressure you experience...Ch. 19 - Calculate the water pressure at the base of Hoover...Ch. 19 - Calculate the water pressure in the pipes at the...Ch. 19 - An 8.6-kg piece of metal displaces 1 liter of...Ch. 19 - A 4.7-kg piece of metal displaces 0.6 liter of...Ch. 19 - Stand on a bathroom scale and read your weight....Ch. 19 - Which is more likely to hurt—being stepped on by...Ch. 19 - Why are persons who are confined to bed less...Ch. 19 - The sketch shows a reservoir that supplies water...Ch. 19 - Prob. 30ACh. 19 - In a deep dive, a whale is appreciably compressed...Ch. 19 - Which teapot holds more liquid?Ch. 19 - What physics principle accounts for the...Ch. 19 - Prob. 34ACh. 19 - If liquid pressure were the same at all depths,...Ch. 19 - If a 1-L container is immersed halfway in water,...Ch. 19 - How much force is needed to push a nearly...Ch. 19 - Why will a volleyball held beneath the surface of...Ch. 19 - A barge filled with scrap iron is in a canal lock....Ch. 19 - Would the water level in a canal lock go up or...Ch. 19 - A ship sailing from the ocean into a fresh-water...Ch. 19 - Suppose you have two life preservers that are...Ch. 19 - When the block of wood is placed in the beaker,...Ch. 19 - When an ice cube in a glass of water melts, does...Ch. 19 - In the hydraulic arrangement shown, the larger...Ch. 19 - Hydraulic devices multiply forces. Why does this...Ch. 19 - Which produces more pressure on the ground, an...Ch. 19 - A hole of area 12cm2 is made in the bottom of a...Ch. 19 - Prob. 49ACh. 19 - A dike in Holland springs a leak through a hole of...Ch. 19 - When a 1.8-kg wrench is suspended in water from a...Ch. 19 - A 13.5-kg block of metal displaces 5 liters of...Ch. 19 - Phil can support 100 N of iron =78,000kg/m3 in...Ch. 19 - A 1-kg rock suspended above water weighs 10 N....Ch. 19 - A merchant in Katmandu sells you a solid gold...Ch. 19 - A prospector desires to know if a nugget is pure...Ch. 19 - Consider a friend of mass 100 kg who can just...Ch. 19 - A gravel barge, rectangular in shape, is 4 m wide...Ch. 19 - A rectangular barge 5 m long and 2 m wide floats...Ch. 19 - A circus elephant weighing 18,800 N is taken on...Ch. 19 - In the hydraulic pistons shown in the sketch, the...Ch. 19 - Try to float an egg in water. Then dissolve salt...Ch. 19 - Punch a couple of holes in the bottom of a...Ch. 19 - Make a Cartesian diver like the one shown below....
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