A drawback of burning biomass to produce electricity is that it is ___. A. Nonrenewable
B. Very costly to use
C. A source of air pollution
D. Not available in many areas ​

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

How is the gravitational force related to the distance between two objects?

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.