Assignment A copper wire of 3m length and 1mm diameter is subjected
to a tension of 5kg weight. Calculate the elongation produced in the
wire, if Young's modulus of elasticity of copper is 120G pa
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Which is the most accurate name for the ionic compound cas?

Matter that emits no light at any wavelength is called

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.