The actual size of a gold nucleus is approximately 7 fm. knowing this, calculate the kinetic energy (ke, or kea, however you may choose to label the measurement) that an alpha particle would need to just touch the outside of the nucleus. does this seem like a reasonable number?
hint - the lhc is currently the most powerful particle accelerator on earth, and i? t operates at 13 tev (tev = 1012 ev).

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Which two particles are found in the center of an atom