The answer is C because when the chemicals on the tip of a match are heated up from friction it ignites.
1 would use less energy. Please vote my answer brainliest! Thanks.
Angle of incidence is 36° and so is the reflection. Both angles are equal.
Answer:

Explanation:
Given that,
Radius of a spherical shell, r = 0.7 m
Torque acting on the shell, 
Angular acceleration of the shell, 
We need to find the rotational inertia of the shell about the axis of rotation. The relation between the torque and the angular acceleration is given by :

I is the rotational inertia of the shell

So, the rotational inertia of the shell is
.