Big Question: An organiser of a bungee competition changes the length of the

bungee rope so different people can

use the rope safely. Use your idea of

forces to describe how the size

of a person affects the rope when

they

jump. Extra info: The rope is 15m long

and it extends by 3m when a

aduit jumps. An adult weighs twice

as much as a child.

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.