D. i. What is friction? ii. Give two advantages of friction.
iii. Give two disadvantages of friction.

Why did large numbers of african migrate to the americas

It is reasonable to assume that nations with a low total fertility rate (tfr) and a modest amount of population growth are in

All of the following are reasons why deserts extremely susceptible to wind erosion except a. they lack major root systems b. they contain thin, dry soil c. they have very few plants and trees d. they are extremely hot and lack water