-B because metal hardly breaks but non metal items such as glass or plastic does!
Centrifugal force is not a real force.
When you move around a curve, there IS a real force pulling you
around the curve. Since your body wants to go straight, it feels as if
there's a force trying to pull you away from the curve. But there isn't.
That feeling of a force is greater when your speed around the curve
is greater, or when the curve is tighter, i.e. smaller radius.
The Moon's diameter is 1/110 the distance between Earth and the Moon. ... The sun's diameter is 1/110 the distance between Earth and the Sun.
Answer:
32I
Explanation:
Data provided in the question:
Rotational inertia of a sphere about an axis through the center = I
Now,
Let the radius of the sphere be 'R'
also,
Rotational inertia = MR²
Here,
M is the mass
Mass = Density ÷ Volume
Volume of sphere = ![\frac{4}{3}\pi R^3](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B3%7D%5Cpi%20R%5E3)
Therefore,
M = Density × ![\frac{4}{3}\pi R^3](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B3%7D%5Cpi%20R%5E3)
Thus,
I = ![\text{Density}\times{\frac{4}{3}\pi R^3}\times R^2](https://tex.z-dn.net/?f=%5Ctext%7BDensity%7D%5Ctimes%7B%5Cfrac%7B4%7D%7B3%7D%5Cpi%20R%5E3%7D%5Ctimes%20R%5E2)
Now for the sphere of radius twice the radius i.e 2R
Volume = ![\frac{4}{3}\pi (2R^3)=\frac{4}{3}\pi\times8R^3](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B3%7D%5Cpi%20%282R%5E3%29%3D%5Cfrac%7B4%7D%7B3%7D%5Cpi%5Ctimes8R%5E3)
Since the density is same
Mass = ![\text{Density}\times\frac{4}{3}\pi8R^3](https://tex.z-dn.net/?f=%5Ctext%7BDensity%7D%5Ctimes%5Cfrac%7B4%7D%7B3%7D%5Cpi8R%5E3)
Thus,
I' = ![\text{Density}\times{\frac{4}{3}\pi 8R^3}\times (2R)^2](https://tex.z-dn.net/?f=%5Ctext%7BDensity%7D%5Ctimes%7B%5Cfrac%7B4%7D%7B3%7D%5Cpi%208R%5E3%7D%5Ctimes%20%282R%29%5E2)
or
I' = 8 × 4 × ![\text{Density}\times{\frac{4}{3}\pi R^3}\times R^2](https://tex.z-dn.net/?f=%5Ctext%7BDensity%7D%5Ctimes%7B%5Cfrac%7B4%7D%7B3%7D%5Cpi%20R%5E3%7D%5Ctimes%20R%5E2)
or
I' = 32I