A student team is to design a human-powered submarine for a design competition. The overall length of the prototype submarine is 4.85 m, and its student designers hope that it can travel fully submerged through water at 0.550 m/s. The water is freshwater (a lake) at T = 15°C. The design team builds a one-fifth scale model to test in their university's wind tunnel. A shield surrounds the drag balance strut so that the aerodynamic drag of the strut itself does not influence the measured drag. The air in the wind tunnel is at 25°C and at one standard atmosphere pressure. At what air speed do they need to run the wind tunnel in order to achieve rimilarity?

A student team is to design a human-powered submarine for a design competition. The overall length of the prototype submarine is 4.85 m, and its student designers hope that it can travel fully submerged through water at 0.550 m/s. The water is freshwater (a lake) at T = 15°C. The design team builds a one-fifth scale model to test in their university's wind tunnel. A shield surrounds the drag balance strut so that the aerodynamic drag of the strut itself does not influence the measured drag. The air in the wind tunnel is at 25°C and at one standard atmosphere pressure. At what air speed do they need to run the wind tunnel in order to achieve rimilarity?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

The South African swimming team sometimes use the UWC pools to practice. Suppose that you take a deep breath and then DIVE 2 m deep into the pool. You immediately feel the pressure against your eardrums. This pressure is dependent on the following parameters OA. the depth and density of the water at that point as well as the gravitational acceleration (g) OB. the density of the water as well as the gravitational acceleration (g) OC. Only the depth of the water at that point. O D. the depth of the water at that point as well as the gravitational acceleration (g)
E.4 If an object floats when completely submerged in water (density = 1 g/cm³) what will happen to it when placed in a tub of alcohol (density = 0.85 g/cm³)?
A tank holds a large amount of water. A pipe is connected to the tank at the upper end and is open to the air at the lower end (see figure).The upper end of the pipe is h1 = 1.90-m above the ground. The lower end of the pipe is h2 = 0.570-m above the ground. The water at the upper end of the pipe has a speed of 0.640 m/s. The water at the lower end of the pipe has a speed of 8.50 m/s.What is the pressure in the water in the pipe at the upper end of the pipe?
Pressure cookers have been around for more than 300 years, although their use has strongly declined in recent years (early models had a nasty habit of exploding). How much force (in N) must the latches holding the lid onto a pressure cooker be able to withstand if the circular lid is 21.0 cm in diameter and the gauge pressure inside is 2.60 atm? Neglect the weight of the lid. N
A Volkswagen with mass m = 8.00 x 102kg is at rest as shown in the figure. Both pistons have a circular cross-sectional area. The small piston has a diameter of d1 = 0.25 m and the large piston has a diameter d2 = 4.5 m. Determine the magnitude of the forceexercised on the small piston.
In a movie, Tarzan evades his captors by hiding under water for many minutes while breathing through a long, thin reed. Assume that the maximum pressure difference his lungs can manage and still breathe is -72 mm-Hg. 1 mm-Hg = 133 N/m2. Q) Determine the maximum distance below the water surface, at which Tarzan could breathe with the reed.
A whale can reach depths of 2551 m below the surface of the ocean. What is the pressure on the whale’s skin at that depth, assuming that the density of seawater is constant from the surface to that depth? The density of seawater at the surface is 1025 kg/m3.
A child is playing with a 0.5 kg ball in the swimming pool. The ball is made of a stiff rubber and has a radius of .25 m. Assume the volume of the ball does not change when held under water. What downward force must the child exert on the ball to hold it in equilibrium just below the surface of the water? a. b. How does this answer change if the child was holding the ball near the bottom of the pool (1.5 m down)?
If a scuba diver descends too quickly into the sea, the internal pressure on each eardrum remains at atmospheric pressure, while the external pressure increases due to the increased water depth. At sufficient depths, the difference between the external and internal pressures can rupture an eardrum. Eardrums can rupture when the pressure difference is as little as 35 kPa. What is the depth at which this pressure difference could occur? The density of seawater is 1025 kg/m3.1-sketch a diagram
(a) Calculate the absolute pressure at an ocean depth of 120 m. Assume the density of sea water is 1 021 kg/m³ and the air above exerts a pressure of 101.3 kPa. Pa (b) At this depth, what is the buoyant force on a spherical submarine having a diameter of 5.20 m? N
V8