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a sample of radioactive material is observed to emit radiation at the rate of 600 countsmin while the background is
assuming the internal emissivity compensation for the radiometer in prob 1218 is exact what temperature will be
consult standard thermodynamic tables and determine the mass concentrations for 1 ppm of freon-12 and ammonia in
calculate the concentration of water vapor in atmospheric air at 80f and 50 percent relative humidity express in units
a grab sampler is used to collect a sample of pure gas if the initial concentration of the gas in the sample volume is
a glass grab sampler has a volume of 100 cm3 calculate the time required to effect a 90 percent purge of the sampler
calculate the mass concentrations of gaseous butane and gaseous propane for 15 ppm in air at standard atmospheric
air at 1 atm and 20c is burned with gaseous propane calculate the percentage compositions of the dry products of
an airstream at 1 atm and 27c contains small spherical particles having a density of approximately 1000 kgm3 the flow
an ad converter is to be supplied for an experimental transducer that has a dynamic range of 45 db and a maximum
for the 40 phon sound level shown in fig 1112 an ad converter is to be provided to assure a resolution of plusmn1 db at
repeat prob 1410 for a resolution of 01c at 25cprob 1410an ad converter is to be designed for a special instrument that
a bar abc having two dilferent cross-sectional areas is loaded by an axial force p see figure parts ab and bc are
calculate the compressive stress ac in the piston rod see figure on page 38 when a force p 36 n is applied to the
a steel wire abc supporting a lamp at its midpoint is attached to supports that are 15 m apart see figure the length of
a car having a mass of 5500 kg is pulled slowly up a steep inclined track by a steel cable see figure the cable has an
an arrangement for pulling a pipe out of the ground is shown in the figure a cable abc is attached to the pipe at a and
a strut and cable assembly abc see figure supports a verticalload p 18 kn the cable has an effective cross-sectional
a round bar acb of total length 2l see figure rotates about an axis through the midpoint c with constant angular speed
three different materials a b and care tested in tension using test specimens having diameters of 12 mm and gage
a specimen of a methacrylate plastic is tested in tension at room temperature producing the stress-strain data listed
a two-story column abc in a building is constructed with a hollow square box section see figure the outside dimensions
a 15 m long bar is made of a structural steel having the stress-strain diagram shown in the figure the yield stress is
a round bar having a length of 12 m and a diameter of 6 mm is made of an aluminum alloy for which the stressstrain
a circular tube of length l 05 m is loaded in compression forces p see figure the outside and inside diameters are 30