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Chapter 11: Q7CQ (page 394)
Figure shows a glass of ice water filled to the brim. Will the water overflow when the ice melts? Explain your answer.
Density of ice is less than that of water so melted ice will occupy less space than ice.
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Pressure cookers have been around for more thanyears, although their use has strongly declined in recent years (early models had a nasty habit of exploding). How much force must the latches holding the lid onto a pressure cooker be able to withstand if the circular lid isin diameter and the gauge pressure inside is? Neglect the weight of the lid.
Consider a group of people trying to stay afloat after their boat strikes a log in a lake. Construct a problem in which you calculate the number of people that can cling to the log and keep their heads out of the water. Among the variables to be considered are the size and density of the log, and what is needed to keep a person鈥檚 head and arms above water without swimming or treading water.
During forced exhalation, such as when blowing up a balloon, the diaphragm and chest muscles create a pressure of\[{\rm{60}}{\rm{.0 mm Hg}}\]between the lungs and chest wall. What force in newton鈥檚 does this pressure create on the\[{\rm{600 c}}{{\rm{m}}^{\rm{2}}}\]surface area of the diaphragm?
Mercury is commonly supplied in flasks containing (about). What is the volume in litres of this much mercury?
What is the pressure inside an alveolus having a radius ofif the surface tension of the fluid-lined wall is the same as for soapy water? You may assume the pressure is the same as that created by a spherical bubble.
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