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The 90-kg man, whose center of gravity is at G, is climbing a uniform ladder. The length of the ladder is 5 m, and its mass is 20 kg. Friction may be neglected.
(a) Compute the magnitudes of the reactions at A and B for x = 1.5 m.
(b) Find the distance x for which the ladder will be ready to fall.
Calculate the true stress when the true strain is 0.05 cm/cm.
The evaporation rate from the surface of a 3650-acre lake is 100 acre-ft/day. Estimate the depth change in the lake in feet during a 1-year period if the net inflow to the lake is 25 cfs. Is the depth increasing or decreasing? What is the change in c..
To orient the total station, a backsight will be made on a POT on the back tangent. Compute lengths and azimuths necessary to stake the curve at 30-m stations.
A steam turbine receives steam at 6 MPa, 800?C. It has a heat loss of 49.7 kJ/kg and an isentropic efficiency of 90%. For an exit pressure of 15 kPa and surroundings at 20?C, find the actual work and the reversible work between the inlet and the e..
A motorist traveling at 55 mph on an expressway intendeds to leave the expressway using an exit ramp with a maximum allowable speed of 30 mph. At what point on the expressway
given f(x) = -2x^6 - 1.5x^4 + 10x +2. use a root location technique to determine the maximum of this function. perform iterations until the approximate relative error falls below 5%.
Find the discharge with an 80% risk of being equaled or exceeded at least once in the next 10 years. (Hint: first find the annual probability of exceedance for this discharge.)
A discharge from a power plant cooling tower has a temperature of 81 degrees C and flows into the stream at a rate of 3 cubic meters per minute. What is the temperature in the stream downstream of the cooling tower discharge
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 on Earth
The field measurements (in feet) for an irregularly shaped sodded area are shown in Figure 17.20. Calculate the area of sod to the closest square yard
A heat pump has a COP of 2 using a power input of 3 kW. Its low temperature is T0 and its high temperature is 80?C, with an ambient at T0. Find the fluxes of exergy associated with the energy fluxes in and out.
With regards to elevator cabs, which subcontractor will provide the wall finishes? Which subcontractor will provide the flooring?
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