Technician A says that empty hazardous waste drums may be disposed of in a public landfill. Technician B says that using a funnel may help prevent spills when filling hazardous waste containers.
Who is right?
O A only
B only
Both A and B
O Neither A nor B

Determine (a) the maximum thermal efficiency of reversible power cycles operating between a hot reservoir at 1000°c and a cold reservoir at 200°c and (b) the maximum cops for reversible refrigeration and heat pump cycies, respectively, between 28°c and 14°c.