Explanation:
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The best answer is C.
The stability of atoms depends on whether or not their outermost shell is filled with electrons. If the outer shell is filled with electrons, the atom is stable and therefore they do not need to react with other elements to become stable.
On the other hand, atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability. To achieve stability, atoms will form two types of chemical bonds called ionic bonds and covalent bonds.
Answer:
a. V3 = 19.36m/s
b. β3 = -18.8°
Explanation:
Our given data is:
mt = 6.4kg; Vo = [10.2*cos(35°), 10.2*sin(35°)] m/s
m1 = 1.4kg; V1 = [-3.7, 0] m/s
m2 = 1.8kg; V2 = [0, 11.1] m/s
By inspection:
m3 = 3.2kg V3 = [ V3x, V3y]
At the point where the ball explodes, there's only x-component of the velocity, so:
Pix = Pfx and Piy = Pfy
On x-axis:
mt * Vo*cos(35°) = m1 * V1x + m3 * V3x
Solving for V3x:
V3x = 18.33 m/s
On y-axis:
0 = m2 * V2y + m3 * V3y
Solving for V3y:
V3y = -6.24 m/s
Therefore, the magnitude is:
The angle is: