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Problems&Exercises
The gauge pressure in your car tires is
at a temperature of
when you drive it onto a ferry boat to Alaska. What is their gauge pressure later, when their temperature has dropped to
?
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Convert an absolute pressure of
to gauge pressure in
(This value was stated to be just less than
in
[link] . Is it?)
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Suppose a gas-filled incandescent light bulb is manufactured so that the gas inside the bulb is at atmospheric pressure when the bulb has a temperature of
. (a) Find the gauge pressure inside such a bulb when it is hot, assuming its average temperature is
(an approximation) and neglecting any change in volume due to thermal expansion or gas leaks. (b) The actual final pressure for the light bulb will be less than calculated in part (a) because the glass bulb will expand. What will the actual final pressure be, taking this into account? Is this a negligible difference?
(a) 0.136 atm
(b) 0.135 atm. The difference between this value and the value from part (a) is negligible.
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Large helium-filled balloons are used to lift scientific equipment to high altitudes. (a) What is the pressure inside such a balloon if it starts out at sea level with a temperature of
and rises to an altitude where its volume is twenty times the original volume and its temperature is
? (b) What is the gauge pressure? (Assume atmospheric pressure is constant.)
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Confirm that the units of
are those of energy for each value of
: (a)
, (b)
, and (c)
.
(a)
(b)
(c)
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In the text, it was shown that
for gas at STP. (a) Show that this quantity is equivalent to
as stated. (b) About how many atoms are there in one
(a cubic micrometer) at STP? (c) What does your answer to part (b) imply about the separation of atoms and molecules?
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Calculate the number of moles in the 2.00-L volume of air in the lungs of the average person. Note that the air is at
(body temperature).
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An airplane passenger has
of air in his stomach just before the plane takes off from a sea-level airport. What volume will the air have at cruising altitude if cabin pressure drops to
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(a) What is the volume (in
) of Avogadro’s number of sand grains if each grain is a cube and has sides that are 1.0 mm long? (b) How many kilometers of beaches in length would this cover if the beach averages 100 m in width and 10.0 m in depth? Neglect air spaces between grains.
(a)
(b)
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An expensive vacuum system can achieve a pressure as low as
at
. How many atoms are there in a cubic centimeter at this pressure and temperature?
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The number density of gas atoms at a certain location in the space above our planet is about
and the pressure is
in this space. What is the temperature there?
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A bicycle tire has a pressure of
at a temperature of
and contains 2.00 L of gas. What will its pressure be if you let out an amount of air that has a volume of
at atmospheric pressure? Assume tire temperature and volume remain constant.
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A high-pressure gas cylinder contains 50.0 L of toxic gas at a pressure of
and a temperature of
. Its valve leaks after the cylinder is dropped. The cylinder is cooled to dry ice temperature
to reduce the leak rate and pressure so that it can be safely repaired. (a) What is the final pressure in the tank, assuming a negligible amount of gas leaks while being cooled and that there is no phase change? (b) What is the final pressure if one-tenth of the gas escapes? (c) To what temperature must the tank be cooled to reduce the pressure to 1.00 atm (assuming the gas does not change phase and that there is no leakage during cooling)? (d) Does cooling the tank appear to be a practical solution?
(a)
(b)
(c) 2.16 K
(d) No. The final temperature needed is much too low to be easily achieved for a large object.
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Find the number of moles in 2.00 L of gas at
and under
of pressure.
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Calculate the depth to which Avogadro’s number of table tennis balls would cover Earth. Each ball has a diameter of 3.75 cm. Assume the space between balls adds an extra 25.0% to their volume and assume they are not crushed by their own weight.
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(a) What is the gauge pressure in a
car tire containing 3.60 mol of gas in a 30.0 L volume? (b) What will its gauge pressure be if you add 1.00 L of gas originally at atmospheric pressure and
? Assume the temperature returns to
and the volume remains constant.
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(a) In the deep space between galaxies, the density of atoms is as low as
and the temperature is a frigid 2.7 K. What is the pressure? (b) What volume (in
) is occupied by 1 mol of gas? (c) If this volume is a cube, what is the length of its sides in kilometers?
(a)
(b)
(c)
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Questions & Answers
classification of plants, gymnosperm features.
what is the features of gymnosperm
Linsy
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what's bulbourethral gland
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
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Jeremiah
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium
Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
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The term pathogen came into use in the 1880s.[1][2
Zainab
Definition of respiration
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
what are the functions of follicle stimulating harmones?
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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Source:
OpenStax, College physics for ap® courses. OpenStax CNX. Nov 04, 2016 Download for free at https://legacy.cnx.org/content/col11844/1.14
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