Estimate the ideal gas and radiation pressure (in n/m 2 ) at the center of the white dwarf sirius b, using 3×10 7 k for the core temperature. compare these values with the estimated core pressure given by p core ≈ 23 πgrho 2 r 2 . hint: when calculating the (ideal) gas pressure, consider sirius b to be made of pure (fully ionized) carbon-12. you can use the average mass density of ∼3×10 9 kg/m 3 . (b.) given what you found in part (a), what fraction of the total pressure in the core is likely to have to be from electron-degeneracy pressure (as opposed to gas and radiation pressure)?

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.

in physics zero. in muscle fatigue could be high

it's a b and