Which of the following statements is an accurate description of sound transmission through various mediums? a. elastic solids prevent sound from being transmitted better than liquids. b. inelastic materials conduct sound better than elastic solids. c. gases conduct sound better than liquids. d. sound insulators prevent sound from being transmitted better than elastic solids.

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

In which of the following is positive work done by a person on a suitcase

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.