Achild's top is held in place upright on a frictionless surface. the axle has a radius of =3.21 mm . two strings are wrapped around the axle, and the top is set spinning by applying t=3.15 n of constant tension to each string. if it takes 0.320 s for the string to unwind, how much angular momentum does the top acquire? assume that the strings do not slip as the tension is applied.
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Physics, 21.06.2019 18:20, gordwindisney3747
What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black
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Physics, 22.06.2019 06:40, PerfectMagZ
Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?
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Physics, 22.06.2019 19:30, VonneB1684
Which describes increasing the efficiency of energy resource
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Achild's top is held in place upright on a frictionless surface. the axle has a radius of =3.21 mm ....
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