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A flying buttress transmits a load P = 25 kN, acting at an angle of 60° to the horizontal, to the top of a vertical buttress AB (see figure). The vertical buttress has height h = 5.0 m
and rectangular cross section of thickness t = 1.5 m and width b 1.0 m (perpendicular to the plane of the figure). The stone used in the construction weighs = 26 kN/m3 . What is the required weight W of the pedestal and statue above the vertical buttress (that is, above section A) to avoid any tensile stresses in the vertical buttress?
During an experiment, an aerospace engineering student measures a wind tunnel's velocity N times. The student reports the following information, based on 90% confidence, about the finite data set: mean velocity=25 m/s, velocity standard deviation=1.5..
What is the damped natural frequency (in rad/s) of a spring-mass-damper system with a mass of 2.2 kg, a stiffness of 225 N/m, and a damping constant of 20 N-s/m?
1 a gas turbine power plant produces a net power output of 100 mw with an overall thermal efficency of 35a if the
consider a 22 ton railrod flatcar on which are located two automobiles facing one another and located at each end of
What is the discharge revised discharge pressure of the compressor.
estimate the wavelength corresponding to maximum emission from each of the following surfaces the sun a tungsten
a 1 kg block of copper at 350degc is quenched in a 10 kg oil bath initially at ambient temperature of 20degc. calculate
An adiabatic constant-volume combustion chamber is filled with a mixture of air and methane; lambda (AFR/AFRs) = 1.3. The initial temperature of the mixture is25°C, and its pressure is 1 bar. After laminar combustion from a single ignition source (an..
a pot of 1 kg of liquid water is heated on a mountain top where the atmospheric pressure is 0.8 bar. if the liquid
three forces each of magnitude p 4kn are applied to the mechanism shown. determine the cross-sectional area of the
Discuss some of the problems that might be encountered when implementing OSHA's machine guarding standards in the workplace. Do you feel that the standards are adequate to control machine guarding hazards in general industry?
A 1200 kg car moving at 20 km/h is accelerated at a constant rate of 4 m/s^2 up to a speed of 75 km/h. What are the forces (N) and total time (s) required?
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