Answer:
Explanation:
Well this really depends on you dude; this question asks for your opinion.
But personally I disagree with this because I like to use different ways to find the answer or in this case describe the entire universe. This is because I can use different variables to solve for the unknown.
If you agree, you can say something like I can memorize this equation or something along the lines.
Answer:

Explanation:
initial frequency of revolution is given as

now initial angular speed is



Similarly final angular speed is given as



Now angular acceleration is given as



Answer:
884 balloons
Explanation:
Assume ideal gas, since temperature is constant, then the product of pressure and volume is constant.
So if pressures reduces from 100 to 1.2, the new volume would be

The spherical volume of each of the balloon of 30cm diameter (15 cm or 0.15 m in radius) is

The number of balloons that 12.5 m3 can fill in is
