If the ball is rolling with a constant speed, what would the net force be? Given:
Force of 41.3N
Frictional force of 7.5N
Mass of 2.1kg
Acceleration of 16.1m/s^2

What are two different ways you could find the value of a? explain these methods.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

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.