Physics, 14.12.2019 02:31, jabper5522
Let’s think of your cell phone as a rectangular solid of uniform density, with dimensions15 cm by 7 cm by 1 cm. imagine what would happen if you flipped it in the air (wedonotrecommend doing this with a real cell phone.)
(a) describe which axis of the phone has thegreatestmoment of inertia. call thisaxis ˆe3in the body frame of the phone.
(b) you spin the phone exactly around the axis in (a) with angular velocityω3= 20sec−1. what is the resulting motion of the phone (no torques are acting on thephone)?
(c) suppose you are not able to spin the phone exactly around the axis ˆe3, but youalso give it some angular velocityω1ω3around one of the other principal axes. show that the motion is stable, that is, thatω1andω2make small oscillations. what is the frequency of these oscillations, in sec−1? it is these little oscillationsthat make the phone wobble as it rotates through the air.
Answers: 3
Physics, 21.06.2019 15:00, zoriahmendoza
Does this organism still meet the definition of a eukaryote ? why or why not?
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Physics, 22.06.2019 06:20, lolweapon
Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.
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Physics, 22.06.2019 11:50, morenodonaldo762
The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e
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