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A stone is dropped from the top of a well that has water in it at a depth of 30.0 m. How long does it take thestone to reach the water?

Stokes' Law describes sedimentation of particles in liquids and can be used to measure viscosity.  Particles in liquids achieve terminal velocity quickly.  One can measure the time it takes for a particle to fall a certain distance and then use Stokes' Law to calculate the viscosity of the fluid.  Suppose a steel ball bearing (density 7.8x103 kg/m3, diameter 3.0 mm) is dropped in a container of motor oil.  It takes 12 s to fall a distance of 0.60 m.  Calculate the viscosity in kilograms per meter per second. Group of answer choices 0.74 0.75 0.76 0.77

A common belief is that a hole in a jet plane can suck a person out. On an episode of a popular TV series, the hosts attempted to determine whether this is possible. According to the hosts' experiment, such an event cannot happen. Did they need to perform the experiment? As a science adviser to the show, the hosts ask you to perform a crude calculation to test the myth. A typical jet plane travels at 542 mph542 mph at a cruising altitude of 25500 ft.25500 ft. The windows on a jet plane measure 14.0 in14.0 in × 14.0 in.14.0 in. Calculate the force ?F exerted on such a window as the plane flies at 25500 ft25500 ft above the sea level. Assume the density and pressure of air at 25500 ft25500 ft are 0.562 kg/m30.562 kg/m3 and 382 mbar,382 mbar, respectively, but that the interior of the plane remains pressurized to atmospheric pressure, 1 atm.1 atm. ?=F=   lblb Calculate the fractional difference between this force and the weight ?manwman of a typical adult male (185…

A 5 kg bag of sand is poured into a funnel and allowed to flow out the bottom of the funnel and onto a scale that is 2.8 m below, where the sand collects. If it takes 11 seconds for all of the sand to flow out of the funnel, what does the scale read 8 seconds after the sand begins collecting? State your answer to the nearest 0.1 N. (Let g= 10 m/s2)

Suppose that you release a small ball from rest at a depth of 69.4 m below the surface in a pool of water (with density pwater) near the surface of the Earth. If the density of the ball is 1/3 the density of water (i.e., Pball = (1/3)pwater), how long does it take the ball to reach the surface? Express your answer in seconds, to at least one digit after the decimal point.

What is the final velocity of the water?

A thin 1.50-mm coating of glycerin has been placed between two microscope slides of width 1.00 cm and length 4.00 cm. Find the force required to pull one of the microscope slides at a constant speed of 0.300 m/s relative to the other slide.

The force on an object moving through a viscous fluid (like honey) is F = -bv, where v is the speed of the object. What are the SI units of b? O kg/s kg/s² kg/m O kg/m² O kg/m · s O none of these

Consider the manometer in Fig. P2–61. If the specificweight of fluid A is 100 kN/m3, what is the absolute pressure,in kPa, indicated by the manometer when the local atmosphericpressure is 90 kPa?