renewable energy help

Question

 

 

which of the following statements is true about the energy efficiency of renewable energy,

 

 

a.   the energy efficiency of renewable energy is always more than 100%

 

b.  the inefficiency of renewable energy comes from wasted heat

 

c.  hydroelectric energy is an inefficient source of energy

 

d.  windmills are an efficient source of energy

 

 

 

 

 

electricity generated from burning garbage in an incineratgor is an example of

 

a.  hydroelectricity

b.  geothermal energy

 

c.  biomass energy

 

d.  solar energy

 

thanks

Answer 1

Hi

      The answer to the first is b. inefficiency in general is because of processes that use some of the energy generated in a non productive way and usually wind up generating un useable heat.

       The second is c. because garbage is a biomass.