Give an example of a physical change and an example of a chemical change

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

How does friction with the atmosphere affect the speed of an artificial satellite

Can create a hboth of these instruments can measure wind speed. doppler radar and psychrometer anemometer and hygrometer doppler radar and anemometer radiosonde and psychrometer