- Which one do I need? The regular N router is less expensive than the later, but I want to buy the right one. What is benefit to the router with 1 gb?
Answer by Frabz
Model and Brand?
- Let N be an arbitrary integer. What is the least number of weights that can be used on
a scale pan to weigh any integral number of pounds from 1 to N inclusive, if the weights
can be placed in either of the scale pans?
Answer by Brian
The weights you need to do this are weights of powers of 3: 1,3,9,27,81,…
If you need to measure up to N, then you will need log_3(2*N+1) weights.
- I know the N shell can hold a max of 32 electrons, but what about when it is just a period 4 element? I think the outermost shell of period 4 elements is the N shell, so there must be some special rule.
Answer by sciteacher
Each level follows the rule e=2n^2
so level 1(n=1) e=2
level 2(n=2) e=2*4=8
n=3 so e=2(9)=18
n=4 so e = 2(16)
n=5 so e=2(25)=50 …………
- The original fermi level of the p and n-regions taken separately are different due to difference in concentration and type of doping. However, at the junction, the energy level diagram usually depicts a common fermi level while conduction and valency bands are displaced. How does that happen?
Answer by epidavros
Energy levels in materials are always relative. In other words, you can say that the conduction band is so many eV above the valence band, but it has no particularly absolute value.
The Fermi level is simply the energy level of the topmost occupied electronic state (at T = 0). Thid once again is relative – you can say where it is with respect to say the valence band.
Until, that is, you join the two materials. When you do this the energy of the topmost occupied state on the n side *must* be the same as that on the p side because the materials are in contact. If it were not, then electrons would flow into the lower energy states across the boundary until they were.
Clearly, for these two levels to be the same across the boundary, the energy bands measured relative to the Fermi level must change, because the band structure must be continuous across the boundary. For this to happen the conduction and valence bands must curve. The origin of this curvature is, of course, and electical potential energy gradient across the junction. This is what gives rise to the intrinsic junction bias.
- What is the energy difference in Joules between the n=6 state and the n=2 state in a hydrogen atom?
Please help me! I just want to know how to solve this problem? Thank you so much!
Answer by Anonymous
You have to solve certain equations.
1) mv^2/r = (4*pi*epsilon)^(-1)*q^2/r^2, i.e. centripetal force is equal to coulomb’s force. Of course, we’re assuming circular orbit. Otherwise, both forces cannot be written as such. It is still a good approximation.
2) Note that an electron in orbit does not emit electromagnetic radiation (despite centripetal acceleration). A quantum approach is needed. The explanation is that angular momentum is quantised. So use L = r x p = mvr = n(h/(2pi)), since r is orthogonal to p and where h is Planck’s constant.
From these two facts you can discover that the energy of an electron in a hydrogen atom is equal to:
-13.6* (1/n^2) eV. It is negative because work must be done by the electron in order to escape the pull of the proton (gravitational analogy works here).
So the difference in energy is: -13.6/6^2 – (-13.6/2^2) eV = 13.6*(8/36) eV = 3.02 eV.
(Note that 1 eV = 1.6 * 10^-19 J, so 3.02 eV = 4.83 * 10^-19 J)
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If you are pregnant, it is advisable to wear a sports bra. The added support will fight against aches and pains. You should also buy some larger underwear to use while you’re pregnant; don’t stick to your small panties which can dig into your skin. If you do, you could not only cause additional discomfort for yourself, but you could also decrease the oxygen supply for your baby.When you initially discover that you’re pregnant, it’s critical to take the necessary time and work to properly educate yourself. There are many things to learn, but you will feel better prepared if you soak up as much as you can. Reduce your stress, and alleviate your fears, by knowing what to expect at the various stages of your pregnancy. Both you and your partner should seriously consider adopting a healthier lifestyle and diet plan. Doing this Check This Page
These spices are able to be used on many things in the kitchen, not just meats. You can use your favorite spices and seasonings to enhance the naturally delicious flavor of scrambled eggs and roasted pumpkin seeds. Your guests will be clamoring to know the secret to your delicious food. If you want the cooking process to be both faster and easier, prepare as much as you can ahead of time. Complete as many steps in advance as you can without risking spoilage. There is a lot you can do the day before to prepare for the next day’s meal. This can make even the most difficult recipes fun and easy. Buy your food at fresh markets. Food you buy from farmer markets and private gardens is going to be healthier for you. These foods are often free of the harmful chemicals that infect out mainstream grocery supply. Look out for the health Check This Page
If your cell phone is capable of charging through a USB interface, make sure you know which version of USB it needs. Some newer phones require USB 3.0. This can mean that plugging them into a USB 2.0 port will just make them power down for lack of juice. Obviously, they will not recharge this way.Did you know that the battery in your cell phone has some reserved power? If you find that your cell phone battery is dead, and you have no way to charge it, enter the USSD “*3370#”. You will see up to a 50% increase in power. This reserve power will charge the next time you charge your phone.If you have a smartphone, be aware that it will probably need to be replaced within a few years. Like a computer, cell phones are consistently using up memory and require newer operating systems. Eventually, your smart phone will become outdated Check This Page
Try to get as close as you can to your photo subject. Subjects lacking in color or details are one of the worst things you can see in a photograph. So, to avoid a subject with a lack of details, make sure everything is clearly visible.For some people, understanding photography can be very hard. Many times, you can’t find where to get great advice on photography. In this article, you will learn information about photography which you were not aware of. Don’t take pictures that feature a gray, overcast sky if you can help it. Including too much of a gray sky will make your pictures appear muted and washed-out. A black and white photo might work best if you have to shoot an overcast sky. If the sky is blue, you should put it in your photo, but be careful of the light.There is a wide variety of editing software available for Check This Page
Not eating a large meal close to bedtime is one of the best ways to prevent snoring. When your stomach is too full, it can makes it’s way up to your diaphragm, thus, limiting your breathing and causing snoring. Stick with big meals at dinnertime and have a light snack instead before bed. Losing weight will often reduce your snoring. A few extra pounds can put a lot of pressure around your neck and obstruct your airways. This means that you have a higher chance of your airways collapsing slightly while you are sleeping. You can notice quite a difference in your snoring if you even lose a few pounds. Try not to go to bed until at least a couple of hours after you have consumed a particularly large meal. One effect of a full stomach is that it pushes up against your diaphragm making it less flexible and restricting its normal Check This Page
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