K) a stream of warm water is produced in a steady-flow mixing process by combining 1.0 kg s-1of cool water at 25°c with 0.8 kg s-1of hot water at 75°c. during mixing, heat is lost to the surroundings at the rate of 30 kj s-1. what is the temperature of the warmwater stream? assume the specific heat of water constant at 4.18 kj kg-1k-1

A1kg cart slams into a stationary 1kg cart at 2 m/s. the carts stick together and move forward at a speed of 1 m/sl. determine whether kinetic energy was conserved in the collision. use the law of conservation of energy to explain the collision

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost