What conditions must be met if a man-made satellite is to attain a circular orbit around the earth? (choose as many as apply)
a) it must be launched with a tangential speed of 0.
b) it must be launched with a tangential speed of 8 km/s.
c) it must be launched with a tangential speed greater than 8 km/s.
d) it must be launched horizontally at a distance over 150 kilometers above the earth.
e) it must be launched vertically with a speed of 8 km/s.

What color would an object that reflects green and blue light appear to be in white light? a. blue b. cyan c. magenta d. black

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

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?