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Physics
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Gravitation
Who &
when
Tides
Black
holes
Cosmology
Problems
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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.
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Who are Penzias & Wilson in 1965.
~ 1950
This is the primary cause of the tides on Earth.
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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.
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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.
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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.
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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.
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What are jets?
This is the name given to the material orbiting and
spiraling
Around a black hole.
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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.
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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.
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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.
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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.
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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.
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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