Archimedes Principle states that the buoyant force acting on an object in a fluid is equal to the weight of the fluid displaced by the object Example A 5cm³ block of lead weighs 055 N The lead is carefully ID: 553946
Download Presentation The PPT/PDF document "Archimedes Principle" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Archimedes PrincipleSlide2
Archimedes Principle states that the
buoyant force acting on an object in a fluid is equal to
the weight
of the fluid displaced by the object.Slide3
Example
A
5-cm³
block of lead weighs 0.55 N. The lead is carefully
submerged
in a tank of mercury. 1-cm³ of mercury weighs 0.13 N. What is the weight of the mercury displaced by the block of lead? Will the block of lead sink or float in the mercury?
Answer: 0.65N, floatSlide4Slide5
Question 1
A 10 cm³ block of paraffin (a type of wax) weighs 0. 085 N. It is carefully submerged in a container
of gasoline
. One cm³ of gasoline weighs 0.0069 N.
a. What is the weight of the gasoline displaced by the paraffin?
b. Will the block of paraffin sink or float in the gasoline?
Answer: 0.069N, sinkSlide6
Question 2
A 30 cm³ chunk of platinum weighs 6.3 N. It is carefully submerged in a tub of molasses. One cm³
of molasses
weighs 0.013 N.
a. What is the weight of the molasses displaced by the platinum?
b. Will the platinum sink or float in the molasses?
Answer: 0.39N, sinkSlide7
Question 3
A 15 cm³ block of gold weighs 2.8 N. It is carefully submerged in a tank of mercury. One cm³ of
mercury weighs
0.13 N.
a. Will the mercury be displaced by the gold?
b. Will the gold sink or float in the mercury?
Answer: 1.95N, sinkSlide8
Question 4
Compare the densities of each pair of materials in questions 1-3 above.
a. paraffin versus gasoline
b. platinum versus molasses
c. gold versus mercury
Answers:
paraffin >
gasoline
Platinum > molasses
gold >
mercurySlide9
Question 5
Does an object’s density have anything to do with whether or not it will float in a particular liquid?
Justify your
answer.
Answer: Between two substances, the higher density material will fall, the smaller density material will rise.Slide10
Question 6
Based on density, explain whether the object would float or sink in the following situations:
a. A block of solid paraffin (wax) in molasses.
b. A gold ring in molten platinum.
c. A piece of platinum in molten gold.
d. A drop of gasoline in mercury.e. A drop of mercury in gasoline.
Answers:
Float
Float
Sink
Float
SinkSlide11
Question 7
A 1-liter container filled with mercury has a mass of 13.6 kg and weighs 133 N. When it is submerged in water, what is the buoyant force on it if the density of water is 1 kg/L
Answers: 9.8 NSlide12
Question 8
A 3.0 kg block of Styrofoam is placed in a 100 L container of fluid that has a density of 0.23 kg/L. The final reading on the tanks level is 113.04 L. If the density of the Styrofoam is 0.15 kg/L, what is the buoyant force acting on it?
Answer: 29.4 N