Physics, 25.10.2019 17:43 NeverEndingCycle
State true or false: if the positive x-axis points to the right and the x-component of velocity is negative, the cart must be moving to the left.
Answers: 3
Physics, 22.06.2019 07:30
Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a springāmass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (ādark absorption linesā)? explain briefly.
Answers: 3
Physics, 22.06.2019 17:00
What equation is used to calculate the weight of an object on a plant ?
Answers: 1
Physics, 23.06.2019 09:30
In the middle of the night you are standing a horizontal distance of 14.0 m from the high fence that surrounds the estate of your rich uncle. the top of the fence is 5.00 m above the ground. you have taped an important message to a rock that you want to throw over the fence. the ground is level, and the width of the fence is small enough to be ignored. you throw the rock from a height of 1.60 m above the ground and at an angle of 54.0 degrees above the horizontal. part a part complete what minimum initial speed must the rock have as it leaves your hand to clear the top of the fence? express your answer with the appropriate units. part b for the initial velocity calculated in the previous part, what horizontal distance beyond the fence will the rock land on the ground?
Answers: 3
Physics, 23.06.2019 10:10
Now that we have a feel for the state of the circuit in its steady state, let us obtain the expression for the current in the circuit as a function of time. note that we can use the loop rule (going around counterclockwise): eāvrāvl=0. note as well that vr=ir and vl=ldidt. using these equations, we can get, after some rearranging of the variables and making the subsitution x=erāi, dxx=ārldt. integrating both sides of this equation yields x=x0eārt/l. use this last expression to obtain an expression for i(t). remember that x=erāi and that i0=i(0)=0. express your answer in terms of e, r, and l. you may or may not need all these variables. use the notation exp(x) for ex.
Answers: 1
State true or false: if the positive x-axis points to the right and the x-component of velocity is n...
Business, 03.05.2021 03:20
History, 03.05.2021 03:20
Mathematics, 03.05.2021 03:20
History, 03.05.2021 03:20
History, 03.05.2021 03:20
Business, 03.05.2021 03:20
Mathematics, 03.05.2021 03:20
Geography, 03.05.2021 03:20
Mathematics, 03.05.2021 03:20
Mathematics, 03.05.2021 03:20