Consider the high temperature diffusion of arsenic at 1619°c for 290 hours into a semi-infinite solid cylinder of pure silicon having a radius r=810 e-6 m. assume values of do = 0.218 cm2/s, q = 332.2 kj/mole, r = 8.314 j/mole-k and a surface concentration 6e18 atoms/cm3. determine the concentration at the ten (10) equally spaced distances from the surface listed below.
a)cx(@x0=0.0? r) = cx0= b)cx(@x1=0.1? r) = cx1= c)-cx(@x2=0.2? r) = cx2=
d)-cx(@x3=0.3? r) = cx3= e)cx(@x4=0.4? r) = cx4= f)-cx(@x5=0.5? r) = cx5=
g)-cx(@x6=0.6? r) = cx6= h)-cx(@x7=0.7? r) = cx7= i)-cx(@x8=0.8? r) = cx8=
j)-cx(@x9=0.9? r) = cx9= k)-cx(@x10=1.0? r) = cx10=

You have been consulted by the mobile phone company hookup about a new augmented reality product called “brows”. they want to develop an alternative to google glasses, which, you recall, is a proposed new product which plans to superimpose a whole range of wireless google services over the user’s ordinary vision of the world. these appear in little circles and ovals, and let you phone people, take photographs, navigate across cities and inside buildings, find shops and update your social media. brows would do this too, but not be limited to special google services. the user would wear a small cylinder-shaped device designed to fit on top of their existing eyewear (glasses or sunglasses). it would project a reversed image onto the inside of the lenses, the reflection of which would be in focus for the user. instead of voice control, the user would control the device by eye and neck movements, which the device would track. the device would connect via bluetooth to the user’s phone, which would supply most of the computing power and wireless connectivity. hookup also wants to know what existing services would be most in demand, and which would not work well with brows. using your knowledge of augmented reality, wearable technology and interface design, is the project feasible? if not, why not? if feasible, how could the product need to be modified for a better experience?

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided

It's time for santa to deliver his presents. assuming he delivers presents all over the world, he has to travel about 75,000,000 miles. if he travels east to west, he can use the time zones to make christmas day last 31 hours. what speed, in miles per hour, must santa fly to get all of his presents delivered?