constants i periodic table a typical nuclear reactor generates 1000 mw (1000 mj/s) of electrical energy in doing so, it produces 2000 mw of waste heat' that must be removed from the reactor to keep it from melting down. many reactors are sited next to large bodies of water so that they can use the water for cooling. consider a reactor where the intake water is at 18 °c. state regulations limit the temperature of the output water to 30°c so as not to harm aquatic organisms

mass and volume are the answers you are looking for

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.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.