Swamps differ from marshes in that swamps (a) are rich in waterfowl (b) are dominated by grasses and rushes (c) have acidic soil (d) are dominated by trees and shrubs

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

What is the frequency if a wave that pases a given pount 22 times in 2 seconds