A boxcar at a rail yard is set into motion at the top of a hump. The car rolls down quietly and without friction onto a straight, level track where it couples with a flatcar of smaller mass, originally at rest, so that the two cars then roll together without friction. Consider the two cars as a system from the moment of release of the boxcar until both are rolling together. (a) Is mechanical energy of the system conserved? Yes No (b) Is momentum of this system conserved? Yes No Next, consider only the process of the boxcar gaining speed as it rolls down the hump. Consider the boxcar and the Earth as a system. (c) Is mechanical energy of this system conserved? Yes No (d) Is momentum of this system conserved? Yes No Finally, consider the two cars as a system as the boxcar is slowing down in the coupling process. (e) Is mechanical energy of this system conserved? Yes No (f) Is momentum of this system conserved? Yes No

20 pointsyou don't need to cite anything, just make it flow better! ! guidelines where did the early christians meet? what were their activities and responsibilities? who were their leaders? what problems did they face? my essay. it is around 200 words, the goal for 250.the church has evolved over several centuries and generations. some of these changes are for the better, such as more people being to be able to worship freely, however, some of these changes were (and are) regretfully for the worse. such an example is the overcommercialization of the church to attract worldly people. overcommercialization causes christians to lose sight of what's important and focus on what's not. it also causes christians to sin just so the can attract a different kind of crowd. but it wasn't always this way. early christians faced more persecution, but that same persecution drove them closer to god. there was really focus on spreading the wonderful news of the gospel instead of hiding behind the things of this world. they would meet in synagogues and homes to share this message too. there was really focus on spreading the wonderful at the beginning of sharing the gospel, the responsibility fell on a few people to spread the word. the disciples were these messengers, along with jesus. the disciples also had the job of finding to spread the word.

In the years after world war ii, which of the following caused many people from asian and african countries to migrate to europe? a. the end of the soviet union b. new economic opportunities after colonialism ended c. the religious freedom found in europe d. new laws allowing greater numbers of immigrants into european countries

George herbert mead argued that the self develops through interactions with others. do you think that your personality or self developed through your interactions with others (parents, friends, teachers) or was it something that you were born with? give an example from your life to support your view.