Answer:
The ratio is 
Explanation:
Generally the Moment of inertia of a spherical object (shell) is mathematically represented as
Where m is the mass of the spherical object
and r is the radius
Now the the rotational kinetic energy can be mathematically represented as
Where 
is the angular velocity which is mathematically represented as
=> ![w^2 = [\frac{v}{r}] ^2](https://tex.z-dn.net/?f=w%5E2%20%20%3D%20%20%20%5B%5Cfrac%7Bv%7D%7Br%7D%5D%20%5E2)
So
![RE = \frac{1}{2}* [\frac{2}{3} *mr^2] * [\frac{v}{r} ]^2](https://tex.z-dn.net/?f=RE%20%20%3D%20%5Cfrac%7B1%7D%7B2%7D%2A%20%20%5B%5Cfrac%7B2%7D%7B3%7D%20%2Amr%5E2%5D%20%2A%20%20%20%5B%5Cfrac%7Bv%7D%7Br%7D%20%5D%5E2)
Generally the transnational kinetic energy of this motion is mathematically represented as
So
The heat capacity and the specific heat are related by C=cm or c=C/m. The mass m, specific heat c, change in temperature ΔT, and heat added (or subtracted) Q are related by the equation: Q=mcΔT. Values of specific heat are dependent on the properties and phase of a given substance.
<u>Answers
</u>
1) B. longitudinal.
2) B. air is cooler than the ground.
<u>Explanation
</u>
Q1
There are two categories of a wave. That is transverse and longitudinal waves. Transverse waves forms crests and troughs while longitudinal forms compressions and rarefaction as they travel. Rarefactions are regions where the wavelengths are longer than other regions.
Q2
As the ray of light moves from an optically less dense to a more dense region it bends towards the normal.
If the sound is bending away from the earth's surface, then the ground must be warmer than the air. As the sound travels it moves from optically dense medium to a less dense medium. For this reason it bends away from the normal. This can only happen when, B. air is cooler than the ground.
Generally, the internal resistance of the new battery is small, about 0.2 euros, while the old battery is large, close to 1 euro ，
