The of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time.
a. amplitude
b. intensity
c. compression
d. frequency

Ophelia has written this thesis statement for her informative speech: while both northerners and southerners believed they fought against tyranny and oppression, northerners focused on the oppression of slaves while southerners defended their own right to self-government. which outline for the rest of her speech is probably the most effective? a. 1. industrial causes of war in the north a. [supporting details] b. [specific examples] 2. agricultural causes of war in the south a. [supporting details] b. [specific examples] conclusion: restate thesis b. 1. though causes on both sides were similar, the north’s cause was more just a. [supporting arguments] b. [specific examples] 2. abolishing slavery was worth dying for a. [supporting arguments] b. [specific examples] 3. south had no right to self-government a. [supporting arguments] b. [specific examples] conclusion: restate thesis c. 1. similarities of the causes of war on both sides a. [supporting details] b. [spec

Social mobility: social mobility refers to our chances of moving up or down within the american class structure. what do you think is the most important factor that leads to upward mobility? and why do you feel that way? race or ethnicity gender social class at birth hard work and education

Hurry ! between 1900 and 2010, how did the world’s population change? a. it increased from about 1.5 billion to almost 7 billion. b. it decreased from about 7 billion to about 1 billion. c. it increased from about 5 billion to about 7 billion. d. it decreased from about 7 billion to about 1.5 billion.