Which of the following statements is true?
a. organs are made up of cells and tissues
b. tissues are made up of organs and cells
c. only some organs contain cells
d. all cells contain at least one tissue.

8. why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (hint: what did the article say about the advantages of digital signals? )

Modify the equation fδt=δ (mv) to find the force of friction.

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?