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The forces acting on the sailplane are represented by three vectors. The lift L and drag D are perpendicular. The magnitude of the weight W is 500 lb. If the magnitude of the resultant of the three
When the Mars Exploration Rover was fully assembled, its mass was 180 kg. The acceleration due to gravity at the surface of Mars is 3.68 m/s2. a) What was the rover's weight when it was at sea level
The C-clamp weighs 14 oz at sea level. [16 oz (ounces) = 1lb.] The acceleration due to gravity at sea level is g = 32.2 ft/s2. a) What is the mass of the C-clamp in slugs b) What is the weight of th
a car is traveling at sea level at 78 mi/h on a 4% upgrade before the driver sees a fallen tree in the roadway 150 feet away. the coefficient of road adhesion is 0.8. The car weighs 2700 lbs, has a
Consider a rectangular wastewater treatment cell having a length of 100ft, width of 20ft and depth of 20ft. If the flow into the cell is 50ft^3/min, calculate the residence time of the treatment cel
The sulfur dioxide (SO2) stack-gas concentration from fossi-fuel combustion is 2 ppmv. Determine the stack-gas SO2 concentration in units of micro grams/m^3. Assume 0C and 1 atm pressure
A mass of .525g of NaCl has been added to a cylinder containing water. The cylinder diameter is 1.5in and depth of water in 5inches. Determine the concentration of the sodium ion in solution, showin
A cylindrical rod with a length of 380 mm and a diameter of 10 mm is to be subjected to a tensile load. The rod must not experience plastic deformation or an increase in length of more than 0.9 mm w
A rectangular block of aluminum 30 mm × 60 mm × 90 mm is placed in a pressure chamber and subjected to a pressure of 100 MPa. If the modulus of elasticity is 70 GPa and Poisson's ratio i
In 1800 an undeveloped country had a population of 10 million with birth and death rates of 60 and 52 per thousand per year. The situation continued until 1900, when the death rate instantaneously w
The elastic portion of the tension stress-strain diagram for an aluminum alloy. The specimen used for the test has a gauge length of 2 in and a diameter of 0.5 in. When the applied load is 9 kips, t
Water is pumped from a reservoir whose surface elevation is 1390 ft to a second reservoir whose surface elevation is 1475 ft. The connecting pipeline is 4500 ft long and 12 in. in diameter.
A 48-in water main carries 79 cfs and branches into two pipes at point A. The branching pipes are 36 and 20 in. in diameter and 2800 and 5000 ft long, respectively. These pipes rejoin at point B and
If a flow of 5.0 cfs is to be carried by an 11000 ft cast-iron pipeline without exceeding a head loss of 137 ft, what must the pipe diameter be
Draw a graph showing the effluent concentration as a function of time for : a. Zero order CMFR and PFR with the same influent concentration and reaction rate. b. First order CMFR and PFR with the sa
A force is specified by the vector F= 120i-160j+80k lb. Calculate the angles made by F with the positive x-,y-, and z- axes.
A motorcyclist travels around a curved path that has a radius of 200 . While traveling around the curved path, the motorcyclist increases speed by 1.25 . If the motorcyclist starts from rest, determ
A hot air balloon starting on the ground ascends at a rate of 12 km/hr and is carried by the wind (horizontally) at a rate of 20 kn/h. When the balloon reaches a height of 50 m, a ballast bag is dro
Investigators have determined that the rate equation for bacterial kill in batch chlorine contact chambers is: rxn rate = dC/dt=-kCt where C is the concentration of bacteria, k is the rate constant,
Section 604 of the act lists the phase-out of production of substances that deplete the ozone layer. What is the last year that carbon tetrachloride can be produced
What is the chemical name of the first hazardous air pollutant under Title III regarding the Clean Air Act
this concentration is based on an assumption that the individual is generally healthy and is exposed for 8 hours per day over a working lifetime ( that is from age 18 to 65 years). assuming a body w
Determine the elastic and plastic section modulus of the I-beam. The axis runs through the center of the beam on both x and y axis (completely symmetrical). Beam properties: h= 12inches tf= 0.5 inch
Consider the components that are required for an automobile. List 5 components and identify the class of material that is used for each component. What are the critical properties that allow for the
Calculate the stress at failure of a concrete test cylinder with a measured diameter of 152.4 mm and a recorded load of 371,426N. Units of ksi.