The roller coaster in this interactive is a model. In real life, not all of the potential energy of the coaster cars is converted to kinetic energy and back again; some
mechanical energy is converted to thermal energy. Describe how mechanical
energy gets converted to thermal energy along the track. How does this
conversion affect the potential energy and kinetic energy during the ride? *

Acompany purchased 200 units for $ 40 each on january 31. it purchased 170 units for $ 50 each on february 28. it sold 225 units for $ 65 each from march 1 through december 31. if the company uses the lastminusin, firstminusout inventory costing method, what is the amount of cost of goods sold on the income statement for the year ending december 31? (assume that the company uses a perpetual inventory system