A mass m = 50 kg is attached to a light string which is wrapped around a cylindrical spool of radius R = 0.1 m and moment of inertia I = 4.0 kgᐧm2. The spool is suspended from the ceiling and the mass is released from rest a distance h = 5 m above the floor. How long does it take for the mass to hit the floor?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.