The kinetic energy needed by the man is ![4.5\cdot 10^9 J](https://tex.z-dn.net/?f=4.5%5Ccdot%2010%5E9%20J)
Explanation:
The escape velocity (the speed needed by an object in the Earth's surface to escape the Earth's gravitational field) is given by
![v=\sqrt{\frac{2GM}{R}}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B%5Cfrac%7B2GM%7D%7BR%7D%7D)
where
G is the gravitational constant
M is the Earth's mass
R is the radius of the Earth
For the Earth, we have
![M=5.97\cdot 10^{24} kg](https://tex.z-dn.net/?f=M%3D5.97%5Ccdot%2010%5E%7B24%7D%20kg)
![R=6.37\cdot 10^6 m](https://tex.z-dn.net/?f=R%3D6.37%5Ccdot%2010%5E6%20m)
Substituting, we find the escape velocity:
![v=\sqrt{\frac{2(6.67\cdot 10^{-11})(5.97\cdot 10^{24})}{6.37\cdot 10^6}}=1.18\cdot 10^4 m/s](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B%5Cfrac%7B2%286.67%5Ccdot%2010%5E%7B-11%7D%29%285.97%5Ccdot%2010%5E%7B24%7D%29%7D%7B6.37%5Ccdot%2010%5E6%7D%7D%3D1.18%5Ccdot%2010%5E4%20m%2Fs)
Now we can find the kinetic energy that the man would need, which is given by
![K=\frac{1}{2}mv^2](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B1%7D%7B2%7Dmv%5E2)
where
m = 65 kg is the mass of the person
is the escape velocity
Substituting,
![K=\frac{1}{2}(65)(1.18\cdot 10^4)^2=4.5\cdot 10^9 J](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B1%7D%7B2%7D%2865%29%281.18%5Ccdot%2010%5E4%29%5E2%3D4.5%5Ccdot%2010%5E9%20J)
Learn more about kinetic energy:
brainly.com/question/6536722
#LearnwithBrainly
Explanation:
Sky appears blue because of Scattering.Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
Then, it jumps to HIGHER ORBITALS
Answer:
Option D
Explanation:
In order to maintain homeostasis, a function is to be performed that leads to functional normality of the body and its organs.
Here, the death of cells is affecting the homeostasis hence in order to restore homeostasis the remaining cells must divide at higher pace so that they can replenish the lost cells and their functions.
Hence, option D is correct