Which option identifies the energy source represented in the following scenario? An enterprising homeowner decides to heat her swimming pool by running pool water through a black housing sandwiched between two sheets of glass.

hydroelectricity
solar heat
biomass
geothermal

What is the rationale for government provision of education? -not all incomes are equal, but everyone has the right to education regardless of wealth. -potential students consider only their personal benefits gained from education, but the rest of society benefits, too. -no education would be provided in the absence of government provision because everyone would consume it without paying. -the cost of providing education for the entire public is too large. -the government can provide education at a much lower cost than the private sector.

Which area of the mind works based on the reality principle? id ego superego conscience

When did human beings first arrive in the americas? how did they get there?