About how much of earth's land surface is used for agriculture? 8% 18% 28% 38%

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.