Answer:
Velocity-time graph of an object moving with uniform velocity. The slope of a Velocity–time graph of an object moving in rectilinear motion with uniform velocity is straight line and parallel to x-axis when velocity is taken along y-axis and time is taken along x-axis
Explanation:
Given that,
Initial speed of the billiard ball 1, u = 30i cm/s
Initial speed of another billiard ball 2, u' = 40j cm/s
After the collision,
Final speed of first ball, v = 50 cm/s
Final speed of second ball, v' = 0 (as it stops)
Let us consider that both balls have same mass i.e. m
Initial kinetic energy of the system is :
![K_i=\dfrac{1}{2}mu^2+\dfrac{1}{2}mu'^2\\\\K_i=\dfrac{1}{2}m(u^2+u'^2)\\\\K_i=\dfrac{1}{2}m((30)^2+(40)^2)\\\\K_i=1250m\ J](https://tex.z-dn.net/?f=K_i%3D%5Cdfrac%7B1%7D%7B2%7Dmu%5E2%2B%5Cdfrac%7B1%7D%7B2%7Dmu%27%5E2%5C%5C%5C%5CK_i%3D%5Cdfrac%7B1%7D%7B2%7Dm%28u%5E2%2Bu%27%5E2%29%5C%5C%5C%5CK_i%3D%5Cdfrac%7B1%7D%7B2%7Dm%28%2830%29%5E2%2B%2840%29%5E2%29%5C%5C%5C%5CK_i%3D1250m%5C%20J)
Final kinetic energy of the system is :
![K_f=\dfrac{1}{2}mv^2+\dfrac{1}{2}mv'^2\\\\K_f=\dfrac{1}{2}m(v^2+v'^2)\\\\K_f=\dfrac{1}{2}m((50)^2+(0)^2)\\\\K_f=1250m\ J](https://tex.z-dn.net/?f=K_f%3D%5Cdfrac%7B1%7D%7B2%7Dmv%5E2%2B%5Cdfrac%7B1%7D%7B2%7Dmv%27%5E2%5C%5C%5C%5CK_f%3D%5Cdfrac%7B1%7D%7B2%7Dm%28v%5E2%2Bv%27%5E2%29%5C%5C%5C%5CK_f%3D%5Cdfrac%7B1%7D%7B2%7Dm%28%2850%29%5E2%2B%280%29%5E2%29%5C%5C%5C%5CK_f%3D1250m%5C%20J)
The change in kinetic energy of the system is equal to the difference of final and initial kinetic energy as :
So, the change in kinetic energy of the system as a result of the collision is equal to 0.
Answer:
Diffusing the gradient ensures that most of the molecules in high concentration zone will wind up in the previously low concentration by the spontaneous movement of small molecules.
Explanation:
A gradient of concentration is the difference between in concentration of one place / area substance to different area. Having a molecule flow down its concentration gradient means moving the molecules from hypotonic areas to the concentration hypertonic areas
Diffusing the gradient ensures that most of the molecules in high concentration zone will wind up in the previously low concentration by the spontaneous movement of small molecules.