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Decay of radioactive materials can be modeled by the equation A=A0*e^(kt) where A is the amount at time t, A0 is the amount at t=0 and k is the decay constant (k <= 0). Iodine-132 is a radioisotope that is used in thyroid function tests. Its half life time is 13.3 hours. Calculate the relative amount of iodine-132 (a/a0) in a patient's body 48 hours after receiving a dose. After determining the value of k, define a vector t= 0, 4, 8, ..48 and calculate the corresponding value of a/a0.
one of the inspectors in the quality control department has frequently used the brinell and rockwell hardness tests for
a beam consists of three planks connected as shown by 3/8 in diameter bolts spaced every 12in.along the longitudinal axis of the beam.knowing that the beam is subjected to a 2500lb vertical shear, determine the average shearing stress in the bolts..
an expansion in a gas turbine can be approximated with a polytropic process with exponent n 1.25. the inlet air is at
1. calculate the specific volume of carbon dioxide 10 degrees celsius and 80 quality?2. calculate the specific volume
a jet engine propels an aircraft at 300 ms through air at 60 kpa and 0 c. the inlet diameter of this engine is 2 m the
1. a circular hovercraft is to levitate at a gap height of 2.5 mm after picking up a payload. the hovercraft has a
An air compressor takes air from outdoors at 28deg C and 101.2kPa and compresses it to 790kPa and 50 deg C. The air input to the compressor is found to be 22.67m3/hr. Estimate the required Hp to operate the compressor.
estimate the rate in galhr that your car uses gasoline when it is being driven on an interstate highway. determine how
The unit cell for uranium has orthorhombic symmetry with a, b and c lattice parameters of 0.286, 0.587, 0.495 nm, respectively. If its density, atomic weight, and atomic radius are 19.05 g/cm3, 238.03 g/mol, and 0.1385 nm, respectively, compute th..
air at 1 atm and 25 ordmc occupies an initial volume of 1200 cm3 in a cylinder. the air is confined by a piston which
a friction less piston-cylinder device initially contains 50 l of saturated liquid refrigerant-134a. the piston is free
Find the transfer function for the following impulse response
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