You are on a hike in the mountains. You have
4.76 km left to go before your next campsite.
Th...
Physics, 29.08.2020 21:01 typicalemi4634
You are on a hike in the mountains. You have
4.76 km left to go before your next campsite.
The sun will set in 5.95 h.
What average speed must you walk to get
to camp at sunset?
Answer in units of km/h.
Answers: 2
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J. j. thomson’s experiment disproved the theory that an atom
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The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656(red) and 486 (blue). light from a hydrogen lamp illuminates a diffraction grating with 500 lines per mm, and the light is observed on a screen 1.50 behind the grating. what is the distance between the first-order red and blue fringes?
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Physics, 23.06.2019 08:30
The center of a long frictionless rod is pivoted at the origin, and the rod is forced to rotate in a vertical plane with constant angular velocity \omega. write down the lagrangian for a bead of mass m threaded on the rod, using r as your generalized coordinate, where r, \phi are the polar coordinates of the bead. (notice that \phi is not an independent variable since it is fixed by the rotation of the rod tobe \phi = \omega * t) solve lagrange's equation for r(t). what happens if the bead is initially at rest at the origin? if it is released from any point ro > 0, show that r(t) eventually grows exponentially. explain your results in terms of the centrifugal force m* \omega ^2 *r.
Answers: 3
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