4. What are some challenges of using waste biomass for energy? How can we overcome those challenges?

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.

What structural formula represents 4 electrons shared between two atoms?