The specific heat of mercury is 140 J/kg K. Its heat of vaporization is 2.06 x 105 J/kg. How much heat is needed to heat 1.0 kg of mercury metal
from 10.00 C to its boiling point and vaporize it completely? The boiling
point of mercury is 3570 C.

A. 49,000 J
B. 260,000 J
C. 310,000 J
D. 360,000 J

An object has a weight of 500 on earth what is the mass of this object

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.

Which of the following best describes the circuit shown below?