Microscopes are used to study the structures of rocks. over time, microscopes have become more and more powerful. as a result of this technological improvement, our structural information of rocks
a. now includes fewer minerals.
b. has become increasingly detailed.
c. has become increasingly debatable.
d. now includes the location of electrons.

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?

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.