A disc is fixed on an axis of rotation that rotate at rate of 40 rev/s. The motion is slowed down uniformly until it stops. If the disc rotates 80 rev before it stops, calculate
a) angular acceleration of the disc.
b) time taken for the disc to stop

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

It indicates no change in temperature and the process of matter changing its state

Sorry i don’t know what to do