Explanation :
Noble gases are the elements of group 18. This series contains helium, neon, radon krypton and radon.
The noble gases are the least reactive of any elements on the periodic table. This is because they have eight valance electrons in its outermost shell.
Non-metals or poly atomic ions forms acidic compounds with hydrogen. For example :
etc forms acidic compounds with hydrogen.
The halogens are the most reactive among all the elements. This is because halogens suddenly combines with most of the metals. They are never seen uncombined in nature.
For example : Chlorine, fluorine and astatine are some halogens.
Answer:
a)
85.05 N/m
b)
179.81 rad/s
Explanation:
a)
k = spring constant of the spring
m = mass of the block = 0.473 kg
x = stretch caused in the spring = 0.109 m
h = height dropped by the block = 0.109 m
Using conservation of energy
Spring potential energy gained by the spring = Potential energy lost by the block
(0.5) k x² = mgh
(0.5) k x² = mgx
(0.5) k x = mg
(0.5) k (0.109) = (0.473) (9.8)
k = 85.05 N/m
b)
angular frequency is given as
![w = \sqrt{\frac{k}{m}}](https://tex.z-dn.net/?f=w%20%3D%20%5Csqrt%7B%5Cfrac%7Bk%7D%7Bm%7D%7D)
![w = \sqrt{\frac{85.05}{0.473}}](https://tex.z-dn.net/?f=w%20%3D%20%5Csqrt%7B%5Cfrac%7B85.05%7D%7B0.473%7D%7D)
= 179.81 rad/s
I'm guessing that the question is how much force is pulling the two charges together. I'll use Coulomb's law where Force = k*Q1*Q2/r^2, where k is Coulomb's Constant= 8.99*10^9. First, r = distance between points = sqrt((0.150+0.15)^2+0^2) = 0.3 Entering this info into the equation = (8.99*10^9)*(6*10^-9)*(6*10^-9)/(0.3)^2 = 3.60*10^-6 Newtons away from each other They repel since both are positive).
Answer:
The Earth's mantle consistency is like melting wax.
Explanation: