PE = mgh KE = 1/2(mv2)
ME = PE + KE
4. If the ball falls from the shelf when it is placed back there, h = 2m What is its speed the
instant before it hits the ground? Set PE = KE and solve for v.

Your 249 ml cup of coffee is too hot to drink when served at 82 degree celsius. what is the mass of an ice cube taken from a -21 degree celsius freezer, that will cool your coffee to a pleasant 54 degree celsius. specific heat of the water is 4190 j/kg c, specific heat of ice is 2090 j/kg c, heat of fusion of ice is 3.33 x 10^5 j/kg

If steel is more dense that lake water, why can a boat float

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force