A cylinder which is in a horizontal position contains an unknown noble gas at 44200 Pa and is sealed with a massless piston. The piston is slowly, isobarically moved inward 0.215 m , while 17700 J of heat is removed from the gas. If the piston has a radius of 0.261 m , calculate the change in internal energy Δ U of the system.

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%