Zdenek Posted November 16, 2007 Share Posted November 16, 2007 Hey Guys, sorry i had to make a new topic for this but i have a huge test to study for and i need some help. This is math 11 Anyways. Here we go. Find the equation of a parabola with the maximum value of 10 and passing through the points (-3,7) and (1,-17). There are two answers. The answers are y=-3/4(x+5)^2 +10 and y=-3(x+2)^2 +10 if you know how to do it could you please explain? Thanks in advance Link to comment Share on other sites More sharing options...
Octane Posted November 19, 2007 Share Posted November 19, 2007 Ok, not sure if this is just me being tired, or if my teacher just wrote the most incoherent sentance....but does this sentance actually make sense to anyone? "Your mass is 65kg. To increase the gravitational force you feel to 4x its surface value do you have to be closer or farther from the earth? By how much must you be closer or farther?" I usually get these questions pretty easily, but for some reason that one is not clicking in my mind. Link to comment Share on other sites More sharing options...
canuck_trevor16 Posted November 21, 2007 Share Posted November 21, 2007 what does alternate and direct current mean? Link to comment Share on other sites More sharing options...
Mr.Noodles Posted November 21, 2007 Share Posted November 21, 2007 what does alternate and direct current mean? Link to comment Share on other sites More sharing options...
canuck_trevor16 Posted November 29, 2007 Share Posted November 29, 2007 what is pangeia Link to comment Share on other sites More sharing options...
Pankotor Posted November 29, 2007 Share Posted November 29, 2007 what is pangeia Link to comment Share on other sites More sharing options...
canuck_trevor16 Posted November 30, 2007 Share Posted November 30, 2007 After the Battle of Manasses, the brigade went into camp near the battlefield for a week. What circumstances required them to move to a new location? Link to comment Share on other sites More sharing options...
Chester Posted November 30, 2007 Share Posted November 30, 2007 After the Battle of Manasses, the brigade went into camp near the battlefield for a week. What circumstances required them to move to a new location? Link to comment Share on other sites More sharing options...
Flaminco Girl Posted November 30, 2007 Share Posted November 30, 2007 Physics 12 please? An 80kg skier starts at rest, and skis down a 110m hill. The skier's speed at the bottom of the hill is 20m/s. What is the net Work done on the skier? How much energy is lost due to friction? Thanks! Link to comment Share on other sites More sharing options...
thenewbie1 Posted November 30, 2007 Share Posted November 30, 2007 Vf^2 = Vo^2 + 2ad where d is 110m and acceleration is gravity. you should get vf>20m/s calculate delta E = 1/2m(Vf^2 - 20^2) for energy lost to friction net work... is.. i don't know. brain fart. actually, don't be surprised if it's all wrong. haven't done kinematics in a while. Link to comment Share on other sites More sharing options...
Flaminco Girl Posted November 30, 2007 Share Posted November 30, 2007 Vf^2 = Vo^2 + 2ad where d is 110m and acceleration is gravity. you should get vf>20m/s calculate delta E = 1/2m(Vf^2 - 20^2) for energy lost to friction net work... is.. i don't know. brain fart. actually, don't be surprised if it's all wrong. haven't done kinematics in a while. Link to comment Share on other sites More sharing options...
canuck_trevor16 Posted December 3, 2007 Share Posted December 3, 2007 Which European country relies on nuclear energy to generate more than 75% of the electricity it uses? Link to comment Share on other sites More sharing options...
thenewbie1 Posted December 3, 2007 Share Posted December 3, 2007 Them Frenchies I believe. Link to comment Share on other sites More sharing options...
Canuckers Posted December 3, 2007 Share Posted December 3, 2007 Which European country relies on nuclear energy to generate more than 75% of the electricity it uses? Link to comment Share on other sites More sharing options...
Canuckers Posted December 4, 2007 Share Posted December 4, 2007 Trig help...calculate all solutions? 1) 4sin^2x=6cosx 2)sin(2x)-cosx-2sinx +1=0 Link to comment Share on other sites More sharing options...
Canuckers Posted December 4, 2007 Share Posted December 4, 2007 Wait... i figured it out 1) replace sin^2x with 1 - cos^2x 4(1-cos^2x) = 6 cosx 4 - 4cos^2x = 6cosx 0 = 4cos^2x + 6cosx - 4 reduce by 2 0 = 2cos^2x + 3cosx - 2 factor 0 = (2cosx -1)(cos x + 2) cosx = 1/2 or cos x = -2 which isn't possible for cos = -2 cosx = 1/2 x = 60 degrees or 300 degrees + 2pi revolutions Link to comment Share on other sites More sharing options...
Starbug Posted December 4, 2007 Share Posted December 4, 2007 Trig help...calculate all solutions? 1) 4sin^2x=6cosx 2)sin(2x)-cosx-2sinx +1=0 Link to comment Share on other sites More sharing options...
Chester Posted December 4, 2007 Share Posted December 4, 2007 Which European country relies on nuclear energy to generate more than 75% of the electricity it uses? Link to comment Share on other sites More sharing options...
canuck_trevor16 Posted December 5, 2007 Share Posted December 5, 2007 anyone know japanese I need help writing a dialogue in japanese with like and dislike I have some good question but I need more thanks Link to comment Share on other sites More sharing options...
Ralph Wiggum Posted December 5, 2007 Share Posted December 5, 2007 anyone know japanese I need help writing a dialogue in japanese with like and dislike I have some good question but I need more thanks Link to comment Share on other sites More sharing options...
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