A. active transport b. facilitated diffusion c. diffusion d. osmosis e. exocytosis

1. the movement of molecules from an area of high concentration to an area of low concentration.
2. the diffusion of water molecules.
3. energy is used to move molecules from an area of low concentration to an area of high concentration.
4. membrane proteins are used to move molecules across the membrane but no energy is required.
5. the movement of molecules down their concentration gradient.
6. the movement of molecules up/against their concentration gradient.
7. membrane proteins are used to move molecules across the membrane but energy from atp is required.
8. a type of active transport that involves vesicles moving molecules out of a cell.

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.

What does natural resource management aim at ?

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?