The outer ring of a wheel and axle is called a ?

a. axle

b. wheel

c. pulley

d. lug

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem