Physics, 23.02.2021 05:10 lovedebrap11ih4
In heart transplant the donor is hundreds or even thousands of miles away from the recipient, so it is important to quickly preserve the heart to prevent damage of the tissue during the journey. This is done by submerging the heart in a saline solution as packing inside a commercial cooler. The heart can be geometrically approximated by a solid, finite cylinder having radius and height 4cm and 9cm respectively and uniform thermal properties. The thermal diffusivity of the heart is 1.5*10-7 m2/s, its initial temperature 37C and the temperature of the saline solution is 28C and it can be assumed that the saline temperature does not vary. (1)Find the temperature at the center of the heart after 3 hours assuming the heart as an infinite cylinder. (2)Recalculate the temperature at the center for a finite cylinder with the dimensions given. (3)Compare and discuss results obtained in (1) and (2).
Answers: 3
Physics, 22.06.2019 14:00
Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.
Answers: 1
Physics, 22.06.2019 15:30
Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?
Answers: 2
Physics, 22.06.2019 18:30
Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material
Answers: 2
In heart transplant the donor is hundreds or even thousands of miles away from the recipient, so it...
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