Submarines use sonar to locate bodies under water. It is similar to the echolocation that dolphins use to “see”. This technology is also used to create underwater topographic maps. What property of waves does sonar take advantage of? a refraction b reflection c interference d diffraction

Which of the following variables has the strongest influence on the variations found in american family life? a. race and ethnicity b. religious affiliation c. social class and culture d. education and occupation

'nepal have varied vegetation as climate and landforms'. justify the statement

Which statement presents a counterclaim to james cross giblin's viewpoint? egyptian hieroglyphs provide information about the country's history, medicine, science, and laws. the rosetta stone allowed people to read ancient egyptian writing. learning how to read hieroglyphs is the best way to understand the ancient culture of the egyptians. digging up ancient egyptian tombs teaches us more about the way people lived than hieroglyphs do