Batteries (e. g., lead-acid batteries) store chemical energy and convert it to electric energy on demand. batteries do not store electric charge or charge carriers. charge carriers (electrons) enter one terminal of the battery, acquire electrical potential energy, and exit from the other terminal at a lower voltage. remember the electron has a negative charge! it is convenient to think of positive carriers flowing in the opposite direction, that is, conventional current, and exiting at a higher voltage. (benjamin franklin caused this mess! ) for a battery rated at 12 v and 350 a-h, determine: a. the rated chemical energy stored in the battery. b. the total charge that can be supplied at the rated voltage.

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

What is the coefficient of kinetic friction μk between the block and the tabletop?