Alfisols can be found in humid areas and semiarid areas. They are formed in forest and savanna vegetation. They are very fertile and productive soils. These soils contains high concentrations of nutrient that are cations like calcium, magnesium, potassium and sodium.
Answer:
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Explanation:
If two negatively charged objects are brought close together, then they will repel each other. If two positively charged objects are brought close together, then they will repel each other. If a positively charged object is brought near to a negatively charged object, they will attract each other.
Important is source , the race of victim , the age , the fatness of his/her body
Answer:
Value of acceleration in each case is ![7.52\ m/s^2 \ and \ 7.14\ m/s^2.](https://tex.z-dn.net/?f=7.52%5C%20m%2Fs%5E2%20%5C%20and%20%5C%207.14%5C%20m%2Fs%5E2.)
Explanation:
According to newton's law :
...equation 1.
In the given case,
Force by both the children - Friction force .
![F_{net} = (75+95)-12=158\ N.](https://tex.z-dn.net/?f=F_%7Bnet%7D%20%3D%20%2875%2B95%29-12%3D158%5C%20N.)
Putting value of F in equation 1.
![a=\dfrac{F_{net}}{m}=\dfrac{158}{21}=7.52\ m/s^2.](https://tex.z-dn.net/?f=a%3D%5Cdfrac%7BF_%7Bnet%7D%7D%7Bm%7D%3D%5Cdfrac%7B158%7D%7B21%7D%3D7.52%5C%20m%2Fs%5E2.)
Now, if friction force = 20 N.
Therefore, ![F_{net}=(75+95)-20=150\ N.](https://tex.z-dn.net/?f=F_%7Bnet%7D%3D%2875%2B95%29-20%3D150%5C%20N.)
Putting value of F and a in equation 1.
![a=\dfrac{F_{net}}{m}=\dfrac{150}{21}=7.14\ m/s^2.](https://tex.z-dn.net/?f=a%3D%5Cdfrac%7BF_%7Bnet%7D%7D%7Bm%7D%3D%5Cdfrac%7B150%7D%7B21%7D%3D7.14%5C%20m%2Fs%5E2.)
Hence , this is the required solution.
Gravitational pulls an object closer together