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Explain in words. What is Newton's law of viscosity?
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- (a) When rebuilding her car's engine, a physics major must exert 300 N of force to insert a dry steel piston into a steel cylinder. What is the magnitude of the normal force between the piston and cylinder? (b) What is the magnitude of the force would she have to exert if the steel parts were oiled?Which of the following is the unit for the coefficient of viscosity: Select one: O a. cm/g.s O b. g.s/cm O c. g.cm/s O d. g/cm.s Clear my choice Next poge ge NEXT ACTIVITYMatch the answers with questions for blocks B and C. 20 g 10 cm B E 20 g 10 cm 40 g 10 cm 40 g 20 cm 30 g. 6 cm v Compare the magnitudes of the buoyant forces on blocks B and C 1. B= C v Compare the magnitudes of the nomal forces on blocks B and C II. B C
- The antiseptics used for cuts and wounds in human flesh have low surface tension. Explain.A person with a muscle cramp in shallow water should try to relax the muscle by stopping the activity and begin floating or changing the swimming stroke. He should change the position of the limb to stretch the cramped muscle and massage the area to help relieve the cramp. * O A. Only the first statement is correct O B. Only the second statement is correct O C. Both statements are incorrect O D. Both statements are correctWhen swimming in the Dead Sea, people tend to float high in the water as compared with swimming in a fresh water lake. Why is this so? Select one: a. The dead sea's density is higher than fresh water density by a fraction. The density gives a force up that is equal to the weight of the displaced water. Since density is higher, the displaced volume is larger for the same force. b. The dead sea is very salty. Its density is almost the same as fresh water density. The buoyancy effect gives a force up that is less than the weight of the displaced water. Since density is more or less equal, the displaced volume is larger for the same force. c. The dead sea is very salty. Its density is higher than fresh water density. The buoyancy effect gives a force up that equals the weight of the displaced water. Since density is higher, the displaced volume is smaller for the same force. d. The dead sea is very salty. Its density is lower than fresh water density. The buoyancy effect gives a force up…
- How did you get the value for the coefficient of viscosity (n)?At small scales, viscous drag becomes very important. To a paramecium (shown), a singlecelled animal that can propel itself through water with fine hairs on its body, swimming through water feels like swimming through honey would to you. We can model a paramecium as a sphere of diameter 50 μm, with a mass of 6.5 x 10-11 kg. You can test the viscosity of a liquid by dropping a steel sphere into it and measuring the speed at which it sinks. For viscous fluids, the sphere will rapidly reach a terminal speed. At this terminal speed, the net force on the sphere isA. Directed downward.B. Zero.C. Directed upward.State Hooke's law. How can it be derived on the basis of interatomic forces?
- On land, the most weight a caveman can hold above his head is 245N. Assuming the density of rock is 2200 kg/m³, what is the weight of the most massive rock this caveman can hold over his head if he is under water? a) What forces act on the rock when the caveman is under water and holds the rock over his head? Draw a free body diagram for the rock. b) Solve for the weight of the most massive rock the caveman can hold over his head under water.Explain surface tension on the basis of molecular theory.An aquarium 5 ft long, 3 ft wide, and 3 ft deep is full of water. (Recall that the weight density of water is 62.5 lb/ft".) (a) Find the hydrostatic pressure on the bottom of the aquarium. Ib/ft2 (b) Find the hydrostatic force on the bottom of the aquarium. Ib (c) Find the hydrostatic force on one end of the aquarium. Ib
