You inflate the tires of your car to a gauge pressure of 38.0 lb/in2. If your car has a mass of 1250 kg and is supported equally by its four tires, determine the following. (a) Contact area between each tire and the road  m2 (b) Will the contact area increase, decrease, or stay the same when the gauge pressure is decreased?   (c) Gauge pressure required to give each tire a contact area of 117 cm2  lb/in

Calculate the Reynolds numbers for the flow of water through the following situations. You may assume the flow rate through the hose and nozzle is 0.5 L/s, and the viscosity of water is 1.005×10−3 (N/m2)s. (A) A nozzle with a radius of 0.21 cm. (B) A garden hose with a radius of 0.95 cm.

What radius needle should be used to inject a volume of 500. cm3 of a solution into a patient in 30.0 min? Assume the length of the needle is 2.5 cm and the solution is elevated 1.0 m above the point of injection. Further, assume the viscosity and density of the solution are those of pure water, and that the pressure inside the vein is atmospheric.

A particular table has three identical legs, and the surface area at the bottom of each leg in contact with the floor is 4.00 x 10m?. Assume the legs are uniformly spaced around the table, and the mass of the table is uniformly distributed with respect to the legs. The total mass of the table is 32.7 kg. What is the pressure (in Pa) on the bottom of each table leg (due to the floor alone, ignoring atmospheric pressure)? Pa Need Help? Read it

A copper wire has a length of 4.5 m and a diameter of 3.6 mm. under what load will it's length increase by 0.30mm?

it’s a lovely day and you decide to launch a giant helium balloon. Once filled, your balloon is a perfect sphere with a radius of 6.90 m. You consider having the balloon lift a crate of water balloons. What is the maximum weight the filled helium balloon can just lift (solve for the equilibrium condition where upward force equals downward force)? Assume that the membrane of the helium balloon has a mass of 920 kg (this does not include the mass of the helium within nor the mass of the crate). Neglect the buoyant force on the crate of water balloons. Density of He is 0.179 kg/m3. Density of air is 1.29 kg/m3. Volume of a sphere is 4/3 π r3. Weight is in N (not kg)

A swimming pool of width 10.0 m and length 29.0 m is filled with water to a depth of 3.5 m. Calculate pressure on the bottom of the pool due to the water.

A vacuum-style lift assist exerts a vertical force on an object by attachment of one or more suction cups to the top of that object. For a lift with four suction cups to provide at least 500 N of lifting force, what is the minimum vacuum pressure (mm Hg) allowable inside each 76-mm-diameter cup attached to the object? Pcup i mm Hg

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