Recent content by Precepts

This may be hard to express without a diagram. For the beam that split left and came back towards the half silvered mirror perpendicular to the aether wind, shouldn't it be solved that way vectorially? My textbook has the speed of light (c) as the hypotenuse. Which has screwed me over in the way...

So I should do P = 2x + 8000x^-1 instead... So x isn't on the bottom? Can you show me the solution?edit - Nvm, simple mistake with the derivative.

Homework Statement I'm stuck on part b) of the question, but this includes the whole thing: A farmer wants to make a rectangular paddock with an area of 4000m^2. However, fencing costs are high and she wants the paddock to have a minimum perimeter. a) Show that the perimeter is given...

Found it. I had to use a negative displacement for the height... I was getting a negative square root prior. Wow...

Right, lol. Can you find t? I tried to incorporate the height and use the quadratic formula, but it wouldn't solve. Kind of stuck here.

Hi, I need someone to check if I did this right. As I got the q's off a PDF with no answers. Homework Statement A projectile is shot from the edge of a cliff 125 m above the ground. It has an initial velocity 50.0 m/s 37.0° above the horizontal at the launch point. a) Determine the time taken...

Thanks for that, I didn't use the quadratic equation and got the correct answer. I forgot about it.

Thanks, could you work the solution for me? I just want to see how you did it. Edit - Nvm, I solved it.

Or at least show me how...?

Yes, I understand this. Can you calculate to include the 2m?

Right, I'm not sure where the 2m comes into it. I want to know the horizontal range for when it hits the ground. I'm not sure how to go about doing this. Thanks.

Homework Statement Calculate the range if a sniper stands and raises his barrel to an angle of 30 degrees above the horizontal with the end of the barrel 2.0 m above the ground. The muzzle velocity of his rifle is 800m/s. Known variables: U = 800ms^-1 Uv = 400m/s Uh = 692.8m/s a =...

Can someone please answer a question I have about engineering: I'm a year 10 student in Australia and will be doing 2 unit Mathematics next year and 2013. Should I do more units of maths as I plan on doing engineering when I finish year 12? I don't want to be catching up during the first year...

It's hard work just like any other Engineering course. Although I have HEARD it's a little more "rigorous". If you have a passion for aircrafts then you will get through it.