How many asteroids (that we know of) are on a potential collision course with earth?
25 - 50
300 - 500
10,000+
0 - 5

Hey hope you get the answer but i suck at math sorry : (

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move. 

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j