Based on your knowledge of energy conservation, which of the following statements is true?
a. manufacturers can increase a light bulb’s energy efficiency by using technology that decreases the amount of electromagnetic energy the bulb converts from a given amount of electrical energy.
b. energy can be conserved by turning off lights when they are not in use.
c. both a and b
d. neither a nor b

Under a tyranny the power to make a political decision is in the hands of a

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

Which is the best conclusion that can be drawn regarding the status of african-americans in the south in the late 1800s? a) african-americans made tremendous political, social, and economic advancements during the reconstruction era. b) passage of the 13th, 14th, and 15th amendments to the u.s. constitution guaranteed equal status and rights for all african-americans. c) the reconstruction policies enacted by the federal government were highly effective in african-american citizens transition to life after slavery. d) although african-americans had equal rights under federal law they were still economically, politically, and socially inferior to whites in the south during the reconstruction era.