Every descriptive investigation has limitations. Imagine doing an investigation in which you want to answer the question, "How many seagulls visit this beach every month?" In what way(s) do you think your investigation would be limited? A. The beach is too large for me to see and count all of the seagulls that are visiting at one time. B. I might count some of the seagulls more than once. C. I can spend only a certain amount of time at the beach, so I probably won't be able to see every single seagull. E PREVIOUS NEXT

Which fators influence ocean currents

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.