Select the term that best matches each description. [ Choose ]
A chemist tests an element and finds
that it does not react with any other
element. What type of element is it
most likely to be?
[ Choose ]
metal
alkali metal
transition metal
nonmetal
metalloid
halogen
An element that has some properties
of both metals and nonmetals is
referred to as a(n)
noble gas
A substance has a shiny surface. It is
[Choose ]
<
-into

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.