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An experiment is designed to measure the partition coefficient, K, associated with the transfer of a pharmaceutical product through a polymer material. The partition coefficient is defined as the ratio of the densities of the species of interest (the pharmaceutical) on either side of an interface. In the experiment, liquid pharmaceutical ( \(\rho=1250 kg/m^3\) ) is injected into a hollow polymer sphere of inner and outer diameters Di= 5mm and Do= 5.1mm, respectively. The sphere is exposed to convective conditions for which the density of the pharmaceutical at the outer surfaces is zero. After one week, the sphere's mass is reduced by \(\Delta M= 8.2 mg\) . What is the value of partition coefficient if the mass diffusivity is Dab= 0.2*10^-11 m^2/s?
At what distance from a backstop will a package need to be placed depending on its weight and knowing it has to hit the backdrop at a velocity of 66 in/sec on a 11 degree angle. What is distance for every 5 lbs of package weight.
You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 1.8x10^7m and its rotation period to be 22.3 hours, find the mass of the planet and star
A 40-g object connected to a spring with a force constant of 30 N/m oscillates with an amplitude of 8 cm on a frictionless, horizontal surface. Find the total energy of the system
An ideal gas expands isothermally, performing 4.30×103J of work in the process. Calculate the heat absorbed during this expansion
Under the influence of its drive force, a snowmobile is moving at a constant velocity along a horizontal patch of snow. compute the distance in which the snowmobile coasts to a halt
A proton is projected in the positive x direction into a region of uniform electric field = (-5.20E5) N/C at t = 0. The proton travels 6.20 cm as it comes to rest, Determine the initial speed of the proton
An object carries a charge of -8.0 microC, while another carries a charge of -2.0 microC. How many electrons must be transferred from the first object to the second
If she is served 200 of coffee at 84 in a well-insulated container, how much ice at 0 should she add to obtain a final temperature of 31.
A negative charge of -0.550 exerts an upward 0.225 force on an unknown charge 0.285 directly below it. what is unknown charge
Two metal spheres of different sizes are charged such that the electric potential is the same at the surface of each, What is the ratio QB/QA and EB/EA
A 9.0W laser beam shines on an ensemble of 1024 electrons, each in the ground state of a one-dimensional infinite square well 0.82nm wide. How many electrons can be so excited if the beam shines for 5.0ms
Two blocks, each have a mass of 10kg are being accelerate across a surface that has a coefficient of friction of 0.2 by applied force F=80N. determine the acceleration of each block
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