Need Ideas for Senior Physics Project?

Question

Hi, I need ideas for senior physics project.

I have to write a scientific report on it.

I cant write about something that just happens.

E.g. - Put hydrogen in a baloon and it flies

I got to be able to compare.

E.g. - Temperature affects the viscocity of tomato sauce.

- By adding more weight to end of pendulum makes it swing faster

It cant be a high risk experiment and it has to be done during class time (day). It cant be too complicated either because we only get 3 weeks of experimenting.

It would be awsome if someone can help me.

Thank you.

Answer 1

comparing electrical conductivity of various fruit juices

or designing a PET rocket, which is basically a water propelled rocket

http://en.wikipedia.org/wiki/Water_rocke...

http://cpphysics.homestead.com/student.h...

Answer 2

Here is an interesting one.  Its called the Mpemba effect.

Compare the speed at which hot and cold water cool to a certain temperature.  You may find that the hot water cools faster than the cold water.