Answer:
In chemistry, a nonmetal is a chemical element that is mechanically weak in its most stable form, brittle if solid, and usually gains or shares electrons in chemical reactions. There is no universal agreement on which elements are nonmetals; the numbers generally range from fourteen to twenty-three, depending on the criterion or criteria of interest.
The equation for force is F=ma. Because we have the value of mass (0.42 kg) and the acceleration (14.8 m/s^2), simply plug them into the equation for force to get
![0.42 \times 14.8 = 6.22](https://tex.z-dn.net/?f=0.42%20%5Ctimes%2014.8%20%3D%206.22)
The answer is 6.22 N because newtons are the unit used to measure force.
It's called buoyancy. It is the tendency of an object to float
Answer:
The gravitational force is related to the mass of each object.
The gravitational force is an attractive force.
Explanation:
Gravitational force is a long range force of attraction between any two masses.
Mathematically given as :
![F=G.\frac{m_1.m_2}{r^2}](https://tex.z-dn.net/?f=F%3DG.%5Cfrac%7Bm_1.m_2%7D%7Br%5E2%7D)
where:
are the masses
r= distance between the center of mass of the two objects.
G= gravitational constant = ![6.67\times 10^{-11} m^3.kg^{-1}.s^{-2}](https://tex.z-dn.net/?f=6.67%5Ctimes%2010%5E%7B-11%7D%20m%5E3.kg%5E%7B-1%7D.s%5E%7B-2%7D)
From the above relation of eq. (1) it is clear that,
Gravitational force is inversely proportional to the square of the distance and directly proportional to the masses.
The mass of an object is independent of its size due to the fact that density may vary for different objects.
The force of gravity varies with height as:
![\frac{g}{g_x} =(\frac{r_x}{r} )^2](https://tex.z-dn.net/?f=%5Cfrac%7Bg%7D%7Bg_x%7D%20%3D%28%5Cfrac%7Br_x%7D%7Br%7D%20%29%5E2)
where:
![g=9.8\,m.s^{-2}](https://tex.z-dn.net/?f=g%3D9.8%5C%2Cm.s%5E%7B-2%7D)
gravity at height
of the center of mass of the object from the center of mass of the earth.
and we know that force:
![F=m\times g](https://tex.z-dn.net/?f=F%3Dm%5Ctimes%20g)
where: m= mass of the object.