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Physics When ready, please click to begin the game! View Credits CLICK SCREEN TO CONTINUE > Gravitation Who & when Tides Black holes Cosmology Problems 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 View Credits He formulated the universal law of gravitation. Find out the answer… Who is Isaac Newton in publishing Principia in 1687. ~ 1700 He made the first measurement of the Universal Gravitation constant. Find out the answer… Who was Henry Cavendish in 1798 ~1800 He postulated that mass bends space and time in his . General Theory of Relativity. Find out the answer… Who is Albert Einstein in 1916. ~ 1900 Either of the two men who accidentally discovered the background radiation left over from the Big Bang. Find out the answer… Who are Penzias & Wilson in 1965. ~ 1950 This is the primary cause of the tides on Earth. Find out the answer… What is the differential pull of the moon on the Earth? These are extreme tides that occur when the Moon, Earth, and Sun are aligned as in a new moon and a full moon. Find out the answer… What are Spring tides. This causes one high tide to be an additional 25 minutes later than just 12 hours from the previous high tide. Find out the answer… What is the amount of revolution of the moon around the Earth in 12 hours? The sun exerts a much larger force on the Earth than does the moon, but the difference between the force on the near and far side of the Earth is greater for the Moon than the Sun. Find out the answer… Why does the Moon effect the tides much more than the Sun? The sphere surrounding a black hole where the escape velocity equals the speed of light. Find out the answer… What is the event horizon? This name refers to black holes that could not have been formed from a star. It is believed they can be found at the center of every galaxy, have a mass of billions of suns and are responsible for holding the galaxy together. Find out the answer… What is a super massive black hole? These are streams of particles shooting out at near the speed of light and directed as if they were emitted from the center of the black hole perpendicular to the disk of debris orbiting the black hole. Find out the answer… What are jets? This is the name given to the material orbiting and spiraling Around a black hole. Find out the answer… What is an accretion disk? This term was coined to mock the concept by Hoyle who didn’t believe it was true, but the term stuck and is now the name we give to the theory of the creation of the universe. Find out the answer… What is the Big Bang? This phrase describes the fact that galaxies that are far away are moving so fast away from us that their light appears to have a lower frequency and longer wavelength than we would normally expect. Find out the answer… What is red shift? This is the name given to the constant of proportionality that relates how far away a galaxy is to its speed relative to us. This constant is somewhere between 50 and 100 ( km/s ) / (Mega parsec). Find out the answer… What is Hubble’s constant? Daily Double!!! This object, discovered in 1974, and named Einstein’s cross is a great example of this phenomenon. Find out the answer… What is gravitational lensing or The bending of light by gravity? If the mass of the moon was doubled and kept in the same location, then this number would describe how much stronger the force of gravity of the moon on the Earth would be. Find out the answer… What is 2? The Universal Gravitation law (and other mathematically similar laws) is know by this Descriptive name because it has the Distance between the objects squared in the denominator. Find out the answer… What is the inverse square law? This is the answer you get when you plug in your mass, the mass of the Earth, the radius of the Earth, and the value of G into the universal gravitation equation. Find out the answer… What is my weight? This is the fraction of your weight you would have if you were to climb up and up and up until you were 1 Earth diameter above the surface of the Earth. Find out the answer… What is 1/9th ? Credits • Customized by the Office of Corporate Communications for JHM – Design by Stephen Gaede – Questions by Shereen Jahed, Kara Yeager, and Amanda Lindeman – www.hopkinsmedicine.org/masp • Original template by Bill Arcuri, WCSD