Wood, water, Forests. The rest can have harm to the nature.
Answer:

Explanation:
Given that
Radius of track = R
Radius of ball = r
The ball can be treated as solid sphere, so
The moment of inertia of ball

When the ball reach at the lowest position then it will have both angular and linear speed.
Condition for rolling without slipping v= ωr
Form energy conservation

v= ωr






Answer:
option B
Explanation:
The correct answer is option B
Comets are the frozen snowball that is made of different gases and which rotates around the sun.
Comets are generally icy but when comets come near to the sum they get warm and release gasses which can be seen from the earth.
Comet produces a visible atmosphere or coma.
examples of comets are Halley's Comet, Comet Encke.
The orbit of comets is entirely beyond the orbit of Neptune.
The final volume of the gas is still 2.4 L, unless you also move it into a different jar or tank. A gas always fills whatever container it's in.