Afuel gauge uses a capacitor to determine the height of the fuel in a tank. the effective dielectric constant keff changes from a value of 1 when the tank is empty to a value of k, the dielectric constant of the fuel, when the tank is full. the appropriate electronic circuitry can determine the effective dielectric constant of the combined air and fuel between the capacitor plates. each of the two rectangular plates has a width w and a length l (fig. p24.68). the height of the fuel between the plates is h

Describe cytokinesis in plants and animals. in animals: in plants.

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?

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.