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The doubling time of any quantity n is related to the continuous growth rate Rcont by the relation 2 = exp n Rcont. Derive an expression for n in terms of the annual growth rate and then estimate what the doubling time for a population growth rate is averaging about 2% per year.
Briefly explain the term engineering mechanics and give complete classification of engineering mechanics - Find the smaller force - Explain the terms mass and weight and also differentiate between them.
a force f causes a carriage to move with rectilinear horizontal motion defined by a constant acceleration of 20ftsec2.
Two bars, one having a circular section of radius b, the other an elliptic section with semiaxes a,b. For equal angles of twist, which bar experiences the larger shearing stress?
A spine attached to a wall maintained at a uniform temperature Tb has the shape of a circular cone with base diameter b, height L and a concave parabolic profile, and it is exposed to a fluid at a uniform temperature T?.
The inner and outer surfaces of a 5-m x 6-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m · °C are maintained at temperatures of 20°C and 5°C, respectively. Determine the rate of heat transfer through the wall, in W.
If the coefficient of kinetic friction between the belt and a package is μk = 0.2, determine the time needed to bring the package to rest on the belt if the belt is moving in the same direction as the package with a speed v = 1 m> s.
steam leaves a power plant steam generator at 3.5 mpa 400degc and enters the turbine at 3.4 mpa 375degc. the isentropic
determine the compressor work input requireed to compress steam isentropically from 100 kpa to 1 mpa assuming that the
an open brayton cycle engine operates with a compressor-pressure ratio of 6 an inlet temperature of 20 c and inlet
a plate clutch has a single pair of mating friction surfaces 300 mm od by 225 id. the mean value of the coefficient of
the total cross-sectional area of the inlet to the jet engines is 20 ft2. assume that the flow properties of the air
Find the enthalpy of the steam discharged into the condenser and the thermal efficiency of the cycle.
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