An ideal gas undergoes two processes in a piston-cylinder device as follows: 1-2 Polytropic compression from T1 and P1 with a polytropic exponent n and a compression ratio of r=V1/V2. 2-3 Constant pressure expansion at P3=P2 until V3=V1. (a) Sketch the processes on a single P−v diagram. (b) Obtain an expression for the ratio of the compression-to-expansion work as a function of n and r. (c) Find the value of this ratio for values of n = 1.4 and r = 6.

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic

What are the applications of electromagnetic waves

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)