the flat rotation curves of spiral galaxies tell us that they contain a lot of dark matter. do they tell us anything about where the dark matter is located within the galaxy?

How will each of the following changes in demand and/or supply affect equilibrium price and equilibrium quantity in a competitive market; that is, do price and quantity increase or decrease, or are the answers indeterminate because they depend on the magnitudes of the shifts?

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

What is the mass of the same rock on the earth