A scientist determined that a rock sample contained 1500 g of uranium-235 and that the isotope had decayed for 2.0 half-lives. How much U-235 is left in the sample?

Which of the following statements accurately describe the importance of the american concept of government and democracy? (select all that apply.)

Suppose that sociologists and cultural anthropologists are tying to measure the amount of child abuse for cross cultural comparison. they run into disagreement over whether spanking a child is abuse or discipline. what problem are they encountering in their research? a. reliability of the definition of abuse. b. validity of the definition of abuse. c. occam's razor about the definition of abuse. d. none of these.

Pl what do you know about bolivia and its diet? how does the culture / natural resources influence what a social group consumes? what habits in your culture contribute to healthy living? how do advertising campaigns affect my food choices? what changes would you have to adapt to have a more balanced life?