What characteristic of carbon (c) makes it essential to living organisms
a. carbon forms crystal structures under certain conditions
b. carbon can exist as a solid, liquid, or gas
c. carbon bonds in many ways with itself to form chains
d. carbon exists in radioactive forms

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

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?