What is the basis for analyzing an energy transfer diagram? the mechanical energy input and output must be equal. heat must always be the largest output. the sum of all outputs must equal the input. electrical energy is an input but not an output.

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

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 are the similarities & differences between a thermistor and a light dependent resistor in physics?