Liquid hazardous wastes are blended in a cstr to maintain a minimum energy content before burning them in a hazardous waste incinerator. the energy content of the waste currently being fed is 8.0 mj/kg (mega-joules/kilogram). a new waste is injected in the flow line into the cstr. it has an energy content of 10.0 mj/kg. if the flow rate into and out of the 0.20 m3cstr is 4.0 l/s, how long will it take the effluent from the cstr to reach an energy content of 9 mj/kg?

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c