Chapter 11: Q8CQ (page 394)
How is pressure related to the sharpness of a knife and its ability to cut?
The surface area of the knife decreases when it becomes sharper.
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In a remote location near the North Pole, an iceberg floats in a lake. Next to the lake (assume it is not frozen) sits a comparably sized glacier sitting on land. If both chunks of ice should melt due to rising global temperatures (and the melted ice all goes into the lake), which ice chunk would give the greatest increase in the level of the lake water, if any?
How do you convert pressure units like millimetres of mercury, centimetres of water, and inches of mercury into units like newtons per meter squared without resorting to a table of pressure conversion factors?
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’s head and arms above water without swimming or treading water.
Calculate the average pressure exerted on the palm of a shot-putter’s hand by the shot if the area of contact is and he exerts a force ofrole="math" localid="1668682357057" on it. Express the pressure inand compare it with thepressures sometimes encountered in the skeletal system.
Could capillary action be used to move fluids in a “weightless” environment, such as in an orbiting space probe?
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