Chapter 11: Q1CQ (page 394)
What physical characteristic distinguishes a fluid from a solid?
Matter mainly exists in three forms such as solid, liquid and gas. Liquids and gases are able to flow and they are collectively known as Fluids.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Pressure between the inside chest wall and the outside of the lungs normally remains negative. Explain how pressure inside the lungs can become positive (to cause exhalation) without muscle action.
How is pressure related to the sharpness of a knife and its ability to cut?
(a) What is the density of a woman who floats in freshwater with of her volume above the surface? This could be measured by placing her in a tank with marks on the side to measure how much water she displaces when floating and when held under water (briefly). (b) What percent of her volume is above the surface when she floats in seawater?
Figure 11.41shows how sandbags placed around a leak outside a river levee can effectively stop the flow of water under the levee. Explain how the small amount of water inside the column formed by the sandbags is able to balance the much larger body of water behind the levee.
Figure 11.41Because the river level is very high, it has started to leak under the levee. Sandbags are placed around the leak, and the water held by them rises until it is the same level as the river, at which point the water there stops rising.
A full-term fetus typically has a mass of\[{\rm{3}}{\rm{.50 kg}}\]. (a) What pressure does the weight of such a foetus create if it rests on the mother’s bladder, supported on an area of\[{\rm{90}}{\rm{.0 c}}{{\rm{m}}^{\rm{2}}}\]? (b) Convert this pressure to millimetres of mercury and determine if it alone is great enough to trigger the micturition reflex (it will add to any pressure already existing in the bladder).
What do you think about this solution?
We value your feedback to improve our textbook solutions.
