Homework Statement
Tangent to C at point P(2,7) has an equation of y=3x+1.
Point Q also lies on C and is perpendicular to the tangent,
show that the X-coordinate is [1/3(2+√6)]
Homework Equations
curve C has equation y= x3-2x2-x+9
dy/dx = 3x2-4x-1
The Attempt at a Solution
gradient of...
Here is the question: http://i259.photobucket.com/albums/hh299/the-real-guitar-hero/Capture_zpsf2b9cd28.png
part A = 3√5
b=y=2X+1
c=(0,1)
D is where I am confused. Area of triangle = (base x height)/2
from working out, line 2 cuts the x-axis at -1/2. line 1 cuts the x at 7. the height is 3...
Hmm, but what is the need for comparison at all, if 1.67x10^-27 is agreed to be 1U of relative mass, and you know the atomic mass of an atom, that is the mass, right?
Sorry, I think I'm confusing myself by over thinking this! :(
Maybe C is used simply because it's easier to weigh as its a...
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Homework Statement
Hi all I have this simple graph that is about how the length of a wire affects it's resistance. I usually get homework questions asking me, what conclusion can you make from you investigation (using the graph) and explain why you made this conclusion. The only problem is...
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... oh... under the question there's another line that says, 'after the collision both balls move to the right but the velocity of ball A is now 1m/s
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ok so my physics textbooks crap, it explains something in a tiny paragraph without any examples (I'm getting new ones). I have this question I'm stuck on. There is 2 balls that both have the mass of 1.5kg, one is not moving and one is moving at 4m/s - so ball A is about to collide with ball B...