Physics, 05.11.2019 05:31 nayashuntel
(a) for a nonsmoker, with blood viscosity of 2.50 10-3 pa·s, normal blood flow requires a pressure difference of 8 mm hg between the two ends of a certain artery. if this person were to smoke regularly, his blood viscosity could increase to 2.80 10-3 pa·s (a 12% increase), and the diameter of his artery would constrict by 11%. what pressure difference between the ends of the artery would then be needed to maintain the same blood flow rate? mm of hg
Answers: 2
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Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.
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You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.
Answers: 2
(a) for a nonsmoker, with blood viscosity of 2.50 10-3 pa·s, normal blood flow requires a pressure d...
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