The african bombardier beetle stenaptinus insignis can emit a jet of defensive spray from the moveable tip of its abdomen. the beetle's body has reservoirs of two different chemicals; when the beetle is disturbed, these chemicals are combined in a reaction chamber, producing a compound that is warmed from 20∘c to 100∘c by the heat of reaction. the high pressure produced allows the compound to be sprayed out at speeds up to 19m/s (68km/h), scaring away predators of all kinds. (the beetle shown in the figure is tethered to a wire fastened to its back by wax. it is responding to having its left foreleg pinched by forceps. the beetle is 2cm long.)

calculate the heat of reaction of the two chemicals. assume that the specific heat capacity of the two chemicals and the spray is the same as that of water, 4.19×103j/kg⋅k, and that the initial temperature of the chemicals is 20∘c.

Amanometer is used to measure the air pressure in a tank. the fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 34 in. if the local atmospheric pressure is 12.7 psia, determine the absolute pressure in the tank for the cases of the

Find the vertex(use the completing the square method), findthe x- and y-intercepts, and sketch the graph offunction. y = 2x2 + 4x - 1

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?