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1.A boat weighing 20,000 metric tons floats. For ease of computation, assume it has a rectangular shape: 295 m long by 40 m wide by 75 m tall. How much of the 75' height is above the water line?
2.Describe how an embedded rebar in concrete can become corroded. If you had a steel rebar of 500MPa strength (manufacturer specified) which lost 20% of its effective cross sectional area due to corrosion, what strength would you estimate remains in this rebar after corrosion?
A person of dubious technical ability tells you that two of the direction angles for a particular vector are 30 and 40 degrees. If these direction angles are feasible, then determine the possible values for the remaning direction angle.
Air at 14.7 psia, 55*F, 60 percent relative humidity is first heated to 72*F in a heating section and then humidified by introducing water vapor. The air leaves the humidifying section at 75*F and 65 percent relative humidity.
Estimate daily evaporation from a lake (cm/day) using Penman's (combined) formula, given the following information: average air temperature is 28 oC, average water temperature is 15 oC, average wind speed at 8m height is 20 Km/hr
Why is the test run in the dark (or in a black bottle)?
The velocity out of the tube may be approximated by V = √(2(p-patm)/ρ), where p is the absolute tank pressure. Determine the time at which the pressure (gage) in the tank is 20 kPa if the initial pressure is 40 kPa (gage)
A car traveling over a hill at constant speed starts to lose contact with the ground at O. If the radius of curvature of the hill is 85 m, determine the speed of the car at O.
We are digging a hole to build a building. Calculate the energy needed to bring the soil to surface level. Remember the sides of the excavation lie at 45 degrees. Else, the whole would be constantly refilling itself.
The cost of tuition at a certain public university was $120 per credit-hour 7 years ago. The cost today (exactly 7 years later) is $255. The annual rate of increase is closest to
Discuss how relative motion is a critical issue in the midair refueling of aircraft. Would control of this process be with the pilot of the tanker or the aircraft being refueled
A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.00 Hz. Ignoring the mass of the spring, what is the mass of the fish?
Calculate the pressure inside a 2-mm diameter bubble of water at 20°C and compare with the pressure inside a 2-mm diameter droplet of water at 20°C.
A radar device is installed at a location on the roadside to measure instantaneous speeds of vehicles passing that location. The initial four vehicles' speeds are listed. Calculate the space-mean speed of these four vehicles.
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