Recent content by milkyway11

Thank you! Can you also take a look at my second question?

So what exactly does that mean?

The problem asks an electron is brought to rest by a potential difference of 1kV. what was the initial velocity of the electron? To begin this problem, I first find the change in potential energy by \DeltaU=q\DeltaV. Since electron has a negative charge, I would have a negative \DeltaU. with...

The problem states: how much work is done in moving an electron from a distance of 1nm to a distance of 10nm away from a hydrogen nucleus? My attempt at the problem is using the W=\DeltaU=q\DeltaV. With this equation I would get a positive work. However, when I reason through the question, I...

Thank you for your fast reply. I think I get why I got a non zero in the first place, because I only calculated the electric field of one proton and completely ignored the other one!

What is the electric field halfway in between two protons separated by a distance of 1mm? When I first did this problem I simply used the electric field equation to solve which is E=kq/r2. However, as I came across another similar problem that states: " a proton and an electron are separated...

But isn't there external force on the rock exerted by the player?

Because I don't quite get why is it zero since there will be acceleration required to throw the rock out by the player and that means there would be velocity

question states: a man of mass 140 kg standing on a frictionless surface throws a 10kg rock horizontally away from himself. what is the momentum of the system immediately after the throw. After I read the problem, I thought it was regarding the complete inelastic collision, in which the...

Thank you for your reply!

The question states: two adult bighorn rams butt heads in an elastic collision. the alpha male 136kg moves slower than his challenger that's 113kg. If the challenger collides at 8m/s and is repelled at 6m/s, find the kinetic energy of the system and the percent increase in speed that the alpha...

Thank you!

question states: a 1980 kg car moving at 13 m/s is brought to a stop in 2 seconds when it collides with a wall. if a new model of this car has a longer crumple zone, the passengers experience a 3217.5 N force upon impact. by what percentage has the period of impact been increased? has the...

thank you, this helps a lot!

question says: a block is given an initial velocity of 2m/s up a frictionless plane inclined at 60 degree to the horizontal. what is the highest point reached by the block? I tried to figure out how to solve the problem by thinking in order to find the highest point, i need the distance it...