Why would it be desirable to use an energy resource that does not produce greenhouse gases?

a. greenhouse gases do not produce carbon dioxide

b. greenhouse gases are inefficient

c. greenhouse gases contribute to climate change

d. greenhouse gases are costly to dispose of

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Which of the following is not am example of a polymer? protein nylon kevlar concreta