A 15kg boulder is going 55 m/s West when it collides with an 8kg boulder going 3 m/s East. They smash together inelasticity. Ignoring friction and heat losses, what is their combined velocity after the smash up?

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

How can you improve the percent yield of copper in this lab? check all possible strategies that will you do so. measure reactants precisely. stir to the reaction take place. chill the reactants before combining them. wait patiently until the reaction completes. make sure to recover as much copper as possible.