Could somebody help me with these please
1- A pilot glided over a tower, located in a direct line with the runway, with 30 m to spare and touched down on the runway at a point 6500 m from the base from the tower, how high is the tower?
2- Using these formulas :
V= IR
R= (pL)/A
A= 3.14
find the difference in current (I) that a copper wire (p=1.27* * m) can carry over an aluminum wire (p= 2.7* * m) with equal diameters (d) of .5 cm and a length (L) of 10 000 m carrying 110 V .
is 10 to the power -8, couldn't type it right.
Thanks in advanced
So there is 30 m of air space between the top of the tower and the plane when it flies over it? I tried a few 30 60 90 triangles to see if I could figure this out for you, but I'm not getting anything near the book answer.
The tower and the runway make a 90 degree angle, forming the two legs of your right triangle. I assume that since the tower will probably be less than 6500 m, I made the angle by the plane my 60 degree angle and the angle of elevation, where the plane lands my 30 deg. angle.
I called the tower height + the extra 30m, "x" and so my equation says:
tan 60 = 6500m/30m(x)
Solve for x I got x = 677, then subtracted the 30m of air space and got 647m for the tower
That is probably the way you should try to solve it, but it isnt the right answer. Hope that helps anyway. Good luck