Search the Questions

11. Why does the earth revolve around the sun in an oval shaped orbit not in a round orbit?
    Published: 6 March, 2009
    Asked by: Sayali Abhimanyu Pawaskar
    Answered by: Philip Nicholson :: Professor
12. Have we ever observed a newborn star "turn on"? Or, is the process of self-sustaining nuclear fusion so gradual that the increase in luminosity of newborn stars is not noticeable in a human lifespan?
    Published: 27 February, 2009
    Asked by: Mark Iuzzolino
    Answered by: Joseph Adams :: Research Associate
13. Where have most dinosaur bones been found? Where have the most dinosaur eggs been found?
    Published: 20 February, 2009
    Asked by: Kevin Cabezas
    Answered by: Richard Kissel :: Paleontologist & Director of Teacher Programs
14. How do scientists detect and measure seismic waves?
    Published: 13 February, 2009
    Asked by: Brenea Bass
    Answered by: Richard Allmendinger :: Professor
15. If you burn a liter of fuel in an internal combustion engine are the emissions the same weight as the weight of the original liter, if not why?
    Published: 6 February, 2009
    Answered by: Michel Louge :: Professor
16. In 1987, there was a supernova which was detected on earth by a burst of neutrinos and also by a flash of light coming from the exploding star. Einstein's relativity principle mandates that nothing can travel faster than the speed of light, so the light and the neutrinos should have reached earth at the same time. But instead, the neutrinos arrived first, followed 6 hours later by the light. What is the explanation of this? Does it mean that Einstein was wrong?
    Published: 30 January, 2009
    Asked by: Jeffrey Lipkowitz MD
    Answered by: Louis Hand :: Professor
17. What causes a tsunami?
    Published: 23 January, 2009
    Answered by: Louise McGarry :: Ph.D Candidate
18. Why are the boiling points of metals with metallic bonds so varied?
    Published: 16 January, 2009
    Answered by: Frank J. DiSalvo :: John A. Newman Professor of Physical Science and Director of the Cornell Center for a Sustainable Future
19. I understand lead was replaced by graphite in pencils. Was this because of lead's harmful effects or because of economic reasons that the lead was replaced?
    Published: 9 January, 2009
    Asked by: Michael Deyhim
    Answered by: Katie Schwarz :: Graduate Student
20. Why does hot air go up and cold air go down?
    Published: 22 December, 2008
    Answered by: Frank J. DiSalvo :: John A. Newman Professor of Physical Science and Director of the Cornell Center for a Sustainable Future