can someone give me a topic for my presentation in my class(engineering student 3rd year)?

Answer 1

ummm...
a volcano

Answer 2

You don't indicate what branch of engineering you are studying, but I'm going to assume you have some background in dynamics and while studying collisions, encountered something called the coefficient of restitution, e, defined by
e = (v2f - v1f) / (v1o -v2o), where
v1o and v1f are the velocities of object 1 before and after a collision, and v2o and v2f are the corresponding velocities of object 2.
Every dynamics book, especially in the chapter(s) discussing conservation of momentum, places emphasis upon this coefficient and requires the solution of numerous problems. You'll have solved these.
My point--and your potential topic--is that aside from the very special experiment of bouncing a golf or tennis ball from a prescribed flat surface, the only places where coefficients of restitution are published are in these same textbooks. There are no standard e-values, even for collisions between, say, steel and steel, or glass and glass. Succinctly, the coefficient of restitution is a useless concept, because the only way to obtain it is to perform the experiment that it is supposed to describe. The coefficient varies with each of the colliding materials, with the speeds (relative and actual) of the colliding bodies, with their shape, with the angle of impact, and with each body's diameter or thickness. Even the yield point of the metal can be a factor.
Conclusion: the coefficient is a useless for all practical applications and teaching it in any application other than bouncing golf or tennis balls is a waste of time.
No, I am not the author of the reference cited below.

Answer 3

What about looking at the use of natural energy sources that can generate small amounts of power using unconventional techniques?

Examples would be something that uses vibrational energy from the strumming of traffic going over a bridge to light the bridge's roadway lamps or a way to use very low head water flow on a road to generate enough energy to light up warning signs that say the road is flooded. As long as you don't get greedy and try to get a lot of energy there are lots of niches that are unfilled for getting free renewable energy.

Answer 4

Latest techniques in electrical transmission and distribution, power control and management. Prepare a paper on the above subject.

Answer 5

AM Stereo

Answer 6

HDTV