A plane decelerates at a constant rate of 3.9 m/s^2 . If the plane's initial velocity was -24 m/s, how long does it take for the plane to come to a complete stop? Round to 1 decimal place if necessary.

This is the substance(s) formed in a chemical reaction.

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f