Answer:
Explanation:
Conservation of momentum
Initial momentum is zero as both gun and bullet are motionless in the frame of reference before firing.
0 = 0.012(1500.0) + 4.0v
v = - 4.5 m/s
Must be a rail gun as the fastest powder driven bullets are moving at roughly half the speed described.
Explanation:
Given that,
Charge on Li, ![q_1=1](https://tex.z-dn.net/?f=q_1%3D1)
Charge on Oxygen, ![q_2=-2](https://tex.z-dn.net/?f=q_2%3D-2)
Atomic radii of lithium, ![r_1=0.068\ nm](https://tex.z-dn.net/?f=r_1%3D0.068%5C%20nm)
Atomic radii of oxygen, ![r_2=0.140\ nm](https://tex.z-dn.net/?f=r_2%3D0.140%5C%20nm)
Distance between charges, ![r=0.068+0.140=0.208\times 10^{-9}\ m](https://tex.z-dn.net/?f=r%3D0.068%2B0.140%3D0.208%5Ctimes%2010%5E%7B-9%7D%5C%20m)
(a) The force pf attraction is given by :
![F=k\dfrac{q_1q_2}{r^2}](https://tex.z-dn.net/?f=F%3Dk%5Cdfrac%7Bq_1q_2%7D%7Br%5E2%7D)
![F=9\times 10^9\times \dfrac{1\times (-2)}{(0.208\times 10^{-9})^2}](https://tex.z-dn.net/?f=F%3D9%5Ctimes%2010%5E9%5Ctimes%20%5Cdfrac%7B1%5Ctimes%20%28-2%29%7D%7B%280.208%5Ctimes%2010%5E%7B-9%7D%29%5E2%7D)
![F=-4.16\times 10^{29}\ N](https://tex.z-dn.net/?f=F%3D-4.16%5Ctimes%2010%5E%7B29%7D%5C%20N)
(b) Let F' is the force of repulsion. We know that when both charges are like, then there is force of repulsion.
F = -F'
![F'=4.16\times 10^{29}\ N](https://tex.z-dn.net/?f=F%27%3D4.16%5Ctimes%2010%5E%7B29%7D%5C%20N)
Hence, this is the required solution.
We wouldn’t really have a solid concept of time. We also wouldn’t be able to keep up with the tides
Answer:
3/4.no because there going in diffrent directions
Explanation:
According to the internet over 2% of earths fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil.