Physics, 18.11.2020 16:50, ChessieGiacalone
Arteriosclerotic plaques forming on the inner walls of arteries can decrease the effective cross-sectional area of an artery. Even small changes in the effective area of an artery can lead to very large changes in the blood pressure in the artery and possibly to the collapse of the blood vessel. Imagine a healthy artery, with blood flow velocity of v0=0.14m/s and mass per unit volume of rho=1050kg/m3. The kinetic energy per unit volume of blood is given byK = (1/2)pv^2PART A. Compared to normal blood flow velocity, v0, what is the velocity of blood as it passes through this blockage?PART B. By what factor does the kinetic energy per unit of blood volume change as the blood passes through this blockage?PART C. As the blood passes through this blockage, what happens to the blood pressure?PART D. Relative to its initial, healthy state, by what factor does the velocity of blood increase as the blood passes through this blockage?
Answers: 2
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To travel at constant speed, a car engine provides 24kw of useful power. the driving force on the car is 600n. at what speed does it travel?
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Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block
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Physics, 23.06.2019 08:30, ldmcloon
Apoint charge +q is at the origin. a spherical gaussian surface centered at the origin encloses +q. so does a cubical surface centered at the origin and with edges parallel to the axes. select "true" or "false" for each statement below. the electric flux through the spherical surface is greater than that through the cubical surface. suppose (for this statement only), that q is moved from the origin but is still within both the surfaces. the flux through both surfaces remains unchanged. the area vector and the e-field vector point in the same direction for all points on the spherical surface. the e-field at all points on the spherical surface is equal due to spherical symmetry. the flux through the spherical gaussian surface is independent of its radius.
Answers: 3
Arteriosclerotic plaques forming on the inner walls of arteries can decrease the effective cross-sec...
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