m. - mass. - mass. say it has a lot of mass, say it has a lot of, begin with... - i. - i. so this thing has two things: weight, it also has mass. you measure mass by how hard it is to change. you measure weight by how heavy it is. see this is quite heavy here, but if i take this on the moon, it's not so heavy. you know why? how heavy had to do with gravity and the mass. on the moon, there's less gravity so it'll be easier to lift. and if i took it to a part of the universe where all the gravities cancel out, put it on a bathroom scale, what would it have? no weight at all, but it still has stuff. it still has mass. if you were in some orbiting space vehicle where the gravity is like-- seems nonexistent and this thing came by like this and it hit your head, boom, it's gonna hurt. you know why it's gonna hurt? because a body in motion tends to... stay in motion. you got a bunch of groceries in your hand in a bag. and the bag is very, very heavy or very, very massive. and you take a hand and you bump into the wall, ooh, you're crunched, you're hurt. but if you're carrying a b

begin with the m. mass. look at the mass of these dudes. it's gonna take a big force to get them going. i mean, when an elephant falls off a cliff, you might think it would just hang there. no, it's got a lot of weight so it goes. okay? two ideas going on, gang. how much force? how much resistance to a motion by that force? inertia, huh? and the little girls, not much force, not much mass. it turns out, their acceleration down the incline, their acceleration down the incline is less than the acceleration freefall. it's not free now. it's constrained with the incline, but they're both the same. and if you take away friction effects, they're exactly the same. and so they both go down the same. everything is okay, because you got to think about the amount mass, that's resistant, the effects of the force. kinda neato. sometimes it's nice when you have a question that burns and later on you get the answer, then you remember it. so far, gang, we've been talking about the ideal case of like no air drag, no air resistance. let's talk about newton's

m. - mass. - mass. say it has a lot of mass, say it has a lot of, begin with... - i. - i. so this thing has two things: weight, it also has mass. you measure mass by how hard it is to change. you measure weight by how heavy it is. see this is quite heavy here, but if i take this on the moon, it's not so heavy. you know why? how heavy had to do with gravity and the mass. on the moon, there's less gravity so it'll be easier to lift. and if i took it to a part of the universe where all the gravities cancel out, put it on a bathroom scale, what would it have? no weight at all, but it still has stuff. it still has mass. if you were in some orbiting space vehicle where the gravity is like-- seems nonexistent and this thing came by like this and it hit your head, boom, it's gonna hurt. you know why it's gonna hurt? because a body in motion tends to... stay in motion. you got a bunch of groceries in your hand in a bag. and the bag is very, very heavy or very, very massive. and you take a hand and you bump into the wall, ooh, you're crunched, you're hurt. but if you're carrying a b

mass of the arm times the speed. but that's a bar room brawl, the heavyweight champion of the world. you wouldn't put an m for the mass of his arm because the heavyweight champion of the world doesn't punch like that, doesn't punch with his arms. the heavyweight champion of the world punches from about the ankles up. oh. oh. okay? the whole mass of the body is in there-- [makes sounds] --from here up. and you take the mass of the whole person then times the speed. honey, that's a humongous momentum. and that momentum is coming at you. now, you gotta stop it. and someone says to you, "hey, well, "you might as well get it over quick. just stand there." good idea or bad idea? bad. so what do you do? you come back. you roll back, and you make the time of impact, the time during which that momentum spends itself, you make that time as long as possible. and when you make the time long, then what happened to the force of impact? shrink. you kinda see that? and what happens if you come in? boom. it happens so quickly, so quickly. and very quickly, the force of impact is huge and it's knockout time. here's somethi

mass? 1, he knows m 2 and he could measure the distance very accurately. he has everything except g. all you got to do is take that force, numerical value, divide it by the product of the masses, divided by the distance square and when he did that he, got a tiny, tiny number 6.67 times 10 to the -11, that's not-- 6.67 times 10 to the -11, that is what he got for the ratio. and you know what? change the masses, put a bigger one or a smaller one, make no difference, change of distance, you'll always get the same ratio of force to mass over distance squared just as you'll always get the same ratio for big circles, circumference to diameter, circumference to diameter. so this is the constant of proportionality. we don't call it 'pi' gang, guess what we call it? 'g' see, that's not called 'pi', that's 'g', big 'g', right, the big 'g'. and so we can say now we have the exact equation f = g... when this experiment was done the science writers correctly interpreted it. they said cavendish who did it first has just measured the mass of the world. because see this piece of chalk? can you measur

management practices for the testing and monitoring and maintaining the purity of publicly-held germ mass mcause there's a concern about that. and we'll, hopefully, continue our efforts outreach. all of this is designed to manage, eliminate, mitigate the risk that is associated when folks want to do things a little bit differently, but they want to do it in the same general space. it's part of managing risk. and then there is the large risk, the long-term risk that we face with the changing climate. and i'll conclude with this. there's no question that the climate is changing. we recently furnished two assessments from usda on the impact of changing climates on agriculture and forestry, and the conclusions were pretty obvious. higher temperatures lead to more intense weather patterns. more intense weather patterns lead to greater stress for crops and livestock and increase tree mortality. and we at usda have a responsibility to figure out ways in which we can mitigate the risk of something that we really can't control, in a sense, when it happens. we can't control when a drought occurs, we

attended the super bowl celebration yesterday but almost lost in the masses was a mob which terrorized some fans for their seats at m&t bank stadium. one mother arrived with two young daughters. she said some of the people who crashed gate c forced them out of their seat. >> they were yelling racial slurs. they told us if we didn't move that we would stab us, all this craziness. it was nothing like what we would have expected considering you could bring your family. >> the victim and families said half a dozen state troopers spotted the mess and could not squeeze through the standing room only crowd. you know who was not happy about this, ravens running back ray rice. he's big into fighting bullying. rice is addressing their bad behavior. he posted quote this is not the baltimore i know and love. y'all need to get a grip. >>> an edgewood man is behind bars for killing a 17-year-old. garfield smith is charged with the murder of christopher karens. it happened at a park in edge wood. karens later died at the hospital. another person is in the hospital. >>> police agencies here in maryland are more village lengths foll

m in rome, pope benedict xvi has celebrated his last public mass as pontiff. he was greeted at the ash wednesday service by ecstatic applause and a standing ovation with people packing a vatican auditorium to catch a glimpse of him. >> benedict told the crowd he was stepping down for the good of the church and ask worshipers to keep praying for him. he had stunned the church on monday when he announced he would become the first pope to abdicate in centuries. >> vatican officials have announced that the conclave to choose a new pope will start at the 15th of march. >> this ash wednesday service marking the start of lent is the last public mass said by pope benedict xvi. he was joined for the emotional ceremony in st. peter's by the cardinals and bishops closest to him. benedict spent the morning in an audience with thousands of followers and for the first time provided details about the thinking that went into his resignation. >> i made this decision in complete freedom for the good of the church. i prayed for a long time and examined my conscience before god b

m" ends with... [laughter] what is it gang? mass, mass. you hear me? okay, come on, we know that. come on, don't be shy. in fact, if we put the correct units in, we can say acceleration is equal to those two. it's equal to the ratio of force to mass. we talked about this before. now we're talking about something analogous, something very similar. we're saying that rotational acceleration depends upon the torque, but also on not just the mass, it has to do with its whole inertia and the inertia to rotation is different than the inertia for just back and forth motion. so instead of saying mass, we say inertia and i use a capital "i". and if i put proper units in, i can call it an exact equation. so how much rotational acceleration you're gonna get something to pick up, huh? will depend upon how much torque you put on it, but how much rotational inertia does that something have. it turns out that rotational inertia is complicated. and we're just gonna get the idea of it today. rotational inertia is mr2, the mass multiplied by the distance from the rotational axis when the mass is loc

ss &pthe streets moving mass of hummnity..... 33 ad lib 3 -3 3 ad lib ad lib 3 -3 3 the paradd ended at m & t baan &psttdiuu whhre onnehundred inside.thousands of baltimore -3 ravens fans cheeerd, sang, &pdaaced aa players weree introduced into thre stadium. the special teams, offense and defense ere introduced.once - on stage... twooof tteebiggess & avens spoke to the crowdd.. -3& 3 22-39"hey this is for you guys.......... this is awesome." awesome." 3 1000129"there is nothing ii the worrd........this city, e other..........in each ooher baltimore.. you can watch alllthe festivities on our ebsite, com... and click on news links. 3& peoole exxerienced the paradd from starttto finish oday onn media.paul gesslee... hashtags... &pand... check- ins... tt... bringgyou & viewer... picturrs... from ttday's celebration.ppul-- 3 today, we focused simply n insttgram... the photo- sharing app witt 90 million &pactivv usersswe ssw some 3 first, at the start of tte -3 paradeeroutee-at city hall... maggie pprter'sspicture showw maryland natiinal guaad & pembers dding push- uus before the paradd.on owar

m man. >> you are such a cherry picker. >> why am i on? >> they have seen zero masshootings in one country. >> if you look. >> that is my point to you mr. lott. >> how about germany? it has stricter laws and up until newtown they had two of the three worst public school shooters. >> pardon? >> in the last ten years they had two. how many in the last ten years have been killed by guns in the last ten years. >> germany had -- >> how many people have money murdered in germany in the last ten year. >> you cited germany do you know the answer to the country that you raised? >> you changed the question. you bring up the thing about school shootings. >> 12,000 gun murders a year. >> what is the point of having anything on. >> here is the deal. you bring up school shootings and i respond and then you go on to something else without letting me finish. >> i ask you the questions. you are the man that wants to tell people. >> you want to talk 90% of the time. >> you haven't let me make a sentence. >> i have let you make many sentences here. you have talked most of the time both

violence security is tight foreigners living on mass protests against the current government are expected in benghazi the birthplace of the revolution a former m i five agent explains why libya has seen any post arab spring optimism destroyed. people have invested a lot of hope in the arab spring i think now they're beginning to realize the harsh reality that a lot of it was backed by the west and the west wants us to strip their country's mineral wealth i mean we're seeing the spillover into other areas like mali and niger as well and this is all part of a bigger sort of power player between the u.s. wanting to secure the minerals or says about africa generally and stop china getting them so in terms of democracy in arab spring you know i think it's very naive to think that that's what the west is trying to help these countries to achieve we've seen an absolute mess left behind by the nato invasion of libya which is what happened two years ago let's not mince words and that was problematic on so many levels not just the international legal level where suddenly aggressive war could be justified as humanitarian intervention even though it stabi

security is tight and foreigners are leaving on mass the first protests against the current government are expected in benghazi the birthplace of the revolution former m i five agent sean explains why libya has seen any post arab spring optimism ultimately destroyed. people have invested a lot of hope in the arab spring i think now they're beginning to realize the harsh reality that a lot of it was backed by the west and the west wants to strip their countries of the mineral wealth i mean we're seeing the spillover into other areas like mali and niger as well and this is all part of a bigger sort of power play i think between the u.s. wanting to secure the mineral resources of africa generally and stop china getting them so in terms of democracy an arab spring you know i think it's very naive to think that that's what the west is trying to help these countries to achieve we've seen an absolute mess left behind by the nato invasion of libya which is what happened two years ago let's not mince words and that was problematic on so many levels not just the international legal level where suddenly aggressive war could be justified as humanitarian intervent

mass destruction a smoking gun could come. join me for the step by step true story of the american government leading the american kids into a war that did not. mazing m s n b c has really dug into how we were all duped by the law isn't misinformation all of us support a war against a sovereign nation that posed no threat to us you know this would have been a great exposé ten years ago before a million people were needlessly killed and i'll bet my bottom dollar that there is a very important piece missing from hubris glaring accounts of the corporate media propagating fake or outright staged events to sell war it goes as far back as media itself conic image of marines raising a flag over it were jima an image that came to symbolize american victory in world war two yeah that was actually a second flag and it's well documented that marines had put up a smaller flag beforehand only to be replaced with a larger one for extra dramatic effect but back to this documentary what impressed me the most is that m s n b c covered how the corporate media has served as little more than a propaganda arm of the u.s. government and when talking about the iraq war noth

mass destruction the smoking gun could. join me for the step by step true story of the american government leading the american people into a war that did not. mazing m s n b c has really dug into how we were all duped by the lives and misinformation all of us support a war against a sovereign nation that posed no threat to us you know this would have been a great exposé ten years ago before a million people were needlessly killed and i'll bet my bottom dollar that there is a very important piece missing from hubris glaring accounts of the corporate media propagating fake or outright staged events to sell war it goes as far back as media itself conic image of marines raising a flag over it were jima an image that came to symbolize american victory in world war two yeah that was actually a second flag. and it's well documented that marines had put up a smaller flag beforehand only to be replaced with a larger one for extra dramatic effect but back to this documentary what impressed me the most is that m s n b c covered how the corporate media has served as a little more than a propaganda arm of the u.s. government and when talking about the iraq war n

m and we are learning about a new possible motive for the new town conn massacre. cbs news setting sources close to the case is reporting that adam lanza was obsess with another mass is reported that adam lanza wanted to top his death toll. that is just one other very that is out there. law enforcement from conn is sharing that. other investigatinformation. there's a storm hitting the bay area right now with lots of clouds and rain. you can see here are live at shot of san francisco that they have a pretty good amount of raindrops falling right now. we will be right back. >> our big story is the snow in the rain. look at this situation in the midwest. as a snow was enough, winds are also at hammering eastern and north dakota. the footage was shot in grand forks. you could see how the wind is kicking up the snow there. the national weather service says gusts reached up to 36 mi. an hour over night. at that to that cold winds and chills and yasin nasty weather pounding the area. >> to 42 on a 680 out southbound at numerous incidents have left traffic jammed up here and we're still looking at a 20 minute drive time. we have not seen much in way of improvement on the