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An experimental rocket sled weighs 5200 ib abd is propelled by six rocket motors each with an impulse rating of 8600 ib-sec. The rockets are fired at 1 sec intervals, and the duration of each rocket firing is 2sec. if the velocity of the sled 10 sec from the start is 200mi\hr, determine the time average R of the total aerodynamic and mechanical resistance to motion. neglect the loss of mass due to exhausted fuel compared with the mass of the sled.
Soil engineers hypothesize that the share of limestone in Austin’s soils is the same as that in San Antonio soils. They take 100 bore holes in each region
A triaxial test was performed on a dry, cohesionless soil under confining pressure of 144 kN/m^2. If the sample failed when the deviator stress reached 395.8 kN/m^2, determine the soil's angle of internal friction.
A nozzle is shaped so that the velocity of flow varies linearly from base to tip. Assuming quasi-one-dimensional flow, what is the convective acceleration midway if v-base= 1 ft/sec, v-tip = 4 ft/sec, and L=18"
A runway used for landing only is used by two types of aircraft, one with an airspeed of 120 knots (nautical miles/hr) and the other with an airspeed of 150 knots. The length of common approach path is 6 nautical miles.
A 5.0-kg block is attached to a spring whose force constant is 125 N/m. The block is pulled from its equilibrium position at x = 0 m to a position at x = + 0.687 m and is released from rest.
The beam is subjected to a force F=825 lb in the direction, and is supported by a pin connection at point B and a rope attached through a pin connection at point A. Problem #1: Draw a complete FBD of the beam.
The air above the liquid is under a pressure of 5 psig, and the specific gravity of the liquid in the tank is 0.80. If the rectangular gate is 6 ft wide and if y1 = 1 ft and y2 = 10 ft, what force P is required to hold the gate in place
Given an azimuth of 251 degrees 11' 23" for line ED. If theangle at DEO is 197 degrees 26' 12" measured clockwise, what is theazimuth and bearing of line EO?
A radioactive waste from a clinical laboratory contains 0.2 μCi (microcuries) of calcium-45 (45Ca) per liter. The half-life of 45Ca is 152 days.
The cost of a 100,000 bbl/d ethanol unit is $40,000,000. From historical records, the capacity exponent ratio for CCR is 0.75. Estimate the cost of a similar ethanol unit with a capacity of 135,000 bbl/d.
What is the expected boiling-point elevation of water for a solution that contains 271 g of sodium chloride dissolved in 1.0 kg of water?
A round steel alloy bar with a diameter of 0.75 in and a gauge length of 3.0 in was subjected to tension, with the results shown in the accompanying table. using a computer spread sheet program, plot the stress-strain relationship. from the graph, de..
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