A ball is on a shelf 6.5 feet from the floor. The ball is bumped and rolls off the shelf, what is the velocity of the ball just before it hits the floor? the ball has a mass of 0.56 pounds. the height of the ball is ___ m

the mass of the ball is Kg

The gravitational potential energy is J

the kinetic energy is J

the velocity of the ball is m/s

Which answer lists the fundamental forces in order from strongest to weakest

There are two steps in the usual industrial preparation of acrylic acid, the immediate precursor of several useful plastics. in the first step, calcium carbide and water react to form acetylene and calcium hydroxide: cac2 (s) + 2h2o (g) → c2h2 (g) + caoh2 (s) =δh−414.kj in the second step, acetylene, carbon dioxide and water react to form acrylic acid: 6c2h2 (g) + 3co2 (g) + 4h2o (g) → 5ch2chco2h (g) =δh132.kj calculate the net change in enthalpy for the formation of one mole of acrylic acid from calcium carbide, water and carbon dioxide from these reactions. round your answer to the nearest kj .

Malia was able to make a paper clip float on the surface of water what will most likely happen to the paper clip if a drop of dishwashing detergent is added near it