50cm3 of 1.5M ammonia solution were shaken with 50cm3 of Chloroform in separating funnel. After allowing the layer to settle 20cm3 of the chloroform
layer were with drown and titrated with 1/20M hydrochloric acid. 22.9cm3 of the
acid were required for neutralization,
Find the partition coefficient of ammonia between water and chloroform at
temperature of the experiment

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

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.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?