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May 25, 2021
Name two experiments that rutherford capitalizes on, which Thomson's model of atomic model failed to agree with
Rutgers, The State University of New Jersey
University of Sheffield
University of Winnipeg
I) How much tension must a rope withstand if it is used to accelerate a 1210-kg car horizontally along a frictionless surface at 1.20 m/s$^2$ ?
(II) A person has a reasonable chance of surviving an automobile crash if the deceleration is no more than 30 $g$'s. Calculate the force on a 65-kg person accelerating at this rate.What distance is traveled if brought to rest at this rate from 95 km/h?
(I) A 7150-kg railroad car travels alone on a level frictionless track with a constant speed of 15.0 m/s. A 3350-kg load, initially at rest, is dropped onto the car. What will be the car's new speed?
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welcome to our first example video looking at boards model of the atom. In this video, we're going to consider some made up Adam that has discrete energy levels of 0.15 1.4 eb 2.6 ev, 4.3 IV and 5.7 e v. Okay, now, this is obviously made up energy levels, but these are the ones we want to consider. Now we have a new electron that's going to come in and hit this Adam, and it's got a velocity of one times 10 to the sixth meters per second. The question is, if we have a new electron here, which energy transitions could be made by running, having this electron run into our Adam Okay, well, we know that we have a new energy in this electron kinetic energy of one half M B squared, of which all or part of this energy could be given to this. Adam, When we go ahead and calculate this, this comes out to be approximately 2.85 e v. So what we want to check now is as long as this trend, the transition has less than this amount of energy, it could be made. So, for example, we could go from 0.15 to 1.4. We could go from 0.15 all the way up to 2.6, but we couldn't make any other transition. So the only allowed transitions are from energy level 1 to 2 and from energy level one, 23 Now, if we had had an electron that was sitting at the energy level two already, could it have made it all the way up? Well, uh, we could have become really, really close because 1.4 plus 2.85 that's going to be That's going to be 4.25 so almost could make it up there. In fact, if it was, we had made it 4.25 e v. It would have been able to jump all the way from 2 to 4 or from 2 to 3. So hopefully you get the idea. What we're looking for is a difference in energy between two energy levels that is less than or equal to 2.85 e v
Condensed Matter Physics