Edison’s success with the electric light is often reduced to the discovery of the carbon-filament light bulb. Yet without creating an entire system, his invention would not have led to the creation of a whole new industry. Besides the carbon-filament light bulb, what element of Edison’s light would you consider most essential? Explain why.

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

The ability to make things happen is also called a. heat b. force c. matter d. energy