Sitting in a second story apartment a physicist notices a ball moving upwards just outside her window the ball is visible for 0.25 seconds as it moves a distance from the bottom to the top of the window. how much time does it take for the ball to reappear

The equation for the height h(t) of an object in free fall at time t with initial velocity v₀ and initial height h₀ is given by:

The change of the height(height of the window) h with time t=0.25s:

Solving for v₀, the velocity of the ball at the bottom of the window:

(i)

The equation for the velocity of an object in free fall with time T:

The moment the ball reaches the top of it's flight the velocity v=0:

(ii)

Setting equations (i) and (ii) equal and solving for T:

The time U it takes the ball to reappear is the difference between the flight time T and twice the time t it takes to cross the window.

i dont think you are wrong for wanting to get even with someone who did you wrong.

(i'm an eye for an eye kind of person) but if this person hurt you in a sexual way, i dont suggest doing anything to him. he should be taken to the proper authorities, you could go to jail depending on what you do. if it was something small like your sibling took your spot on the couch, than yea, i would get even with him by taking one of his favorite snacks lol. but i dont suggest you doing anything illegal.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.