What do we mean when we say that the rotation curve for a spiral galaxy is "flat? "?

What does it mean if a piece of wood is ripped? it has been water-damaged. it has been cut with the grain. it has been cut against the grain. it has been covered with laminate.

Which of the following statements best describes the quantity theory of inflation? a. inflation occurs because production cost rise and this cost increase is passed on to consumers in the form of higher prices b. inflation occurs because there is too much money in the economy c. inflation occurs because demand of good and services exceeds existing supplies d. none of these

What are cutting "steps" or terraces