Engineering, 07.11.2019 04:31 meganwintergirl

Anew composite material is being developed for an advanced aerospace structure. the material's density is to be determined from the mass of a cylindrical specimen. the volume of the specimen is determined from diameter and length measurements. it is estimated that the mass, m, can be determined to be within 0.1 lbm using an available balance scale; length, l, to within 0.05 in. and diameter, d, to within 0.0005 in. (a) estimate the design stage uncertainty in the determination of the density. (b) which parameter's measurement would contribute most to the uncertainty in the density? use nominal values of m-4.5 lbm, l 6 in., and d- 4 to. hint for cylindrical component, the vtd l 4 e volume volume , therefore the density m 4m rho ξ y : tpr . úse the error propagation rule to determine the design stage uncertainty

Answers: 1

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:10

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Answers: 1

Answer

Engineering, 04.07.2019 18:20

Select any two (2) areas of applications of chain-drive. (clo4) a)-permanent lubrication necessary b)-hydraulic forklift truck operation c)-rigging and heavy moving materials d)-relatively high maintenance costs e)-costlier than belt drives

Answers: 2

Answer

Engineering, 04.07.2019 18:20

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

Answers: 3

Answer

You know the right answer?

Anew composite material is being developed for an advanced aerospace structure. the material's densi...

Questions