Recent content by mattstjean

Is it when b2-4ac = 0 ?

The quadratic formula was my first guess however, since it has two variables: m and x...I didn't know how to use it properly.

The Question asks: Find the value of m > 0 for which the line y = mx touches the parabola y = (x - 1)2 + 1 at just one point. So far what I've done... I know that if the line touches the parabola at one point, it is tangential. So I put together the 2 equations in order to find the...

For the second one I'm thinking that the velocity at 0s would be 0.21 cm/s [E] because it's at the very top and at 15s I think it's 0.21cm/s [S] because it's at the very right. I was also asked to compute the change in velocity between 0.0 and 15 seconds and the average vector acceleration...

I'd rather be steered in the right direction with some hints and tips rather than given the answer. I'll die on my test without knowing how to arrive on the answer. Could you tell me how you get to that answer for the second one? And what does (2qrt2)/15 mean...

Well, it's not as simple as I thought ... I think I got the first part right. I did: r= 2cm (because the second hand is 2cm long and it is ask about from the tip) c=\pi\ r 2 c = 12.5663706 cm V = c/t V = 12.5663706cm / 60s V = 0.209439510 s So I said the speed of the tip of...

Thanks. It seems the simplest questions give me the hardest trouble. I always tend to over-complicate something that ends up being a lot more straight forward.

If you want to save time... m/s - km/h *3.6 km/h - m/s /3.6

Homework Statement A watch has a second hand 2.0cm long. a) compute the speed of the tip of the second hand. b) What is the velocity of the tip of the second hand at 0.0s and 15s Homework Equations No Idea... The Attempt at a Solution I drew a clock...but I don't even know...

It depends your level of education. With just an undergraduate degree in chemical engineering you'll be starting out with a 45-60k salary as a junior engineer until you work up to a project engineer making around 80k, or the engineering manager making around 120k. However, if you do...

I don't know how to redo it. In my textbook it used them both together in the y and x component vector subtraction. I took the equations right out of my text, Nelson Physics 12.

Hi, I am also having trouble with the hockey puck question. A hockey puck rebounds from a board as shown in my diagram. The puck is in contact with the board for 2.5 ms. Determine avg acceleration of the puck over the interval. Vi = 26 m/s Vf = 21 m/s I tried the cosine law but I keep...

oh my... thanks a lot. i'll be able to sleep tonight now.

That equation doesn't work. It's 2 dimensional. South acceleration with an Eastern intial velocity. I've been on that question for way too long. Please help.