The Cavendish experiment
, performed in 1797–1798 by English scientist Henry Cavendish
How did Cavendish measure gravity?
The Cavendish experiment uses
a torsion balance
to measure the weak gravitational force between lead balls. A torsion balance consists of a bar suspended at its middle by a thin wire or fiber. Twisting the wire requires a torque that is a function of the wire width and material.
How did Isaac Newton measure gravity?
Newton showed that if gravity at
a distance R was proportional to 1/R
2
(varied like the “inverse square of the distance”), then indeed the acceleration g measured at the Earth’s surface would correctly predict the orbital period T of the Moon.
What is Albert Einstein theory?
Albert Einstein, in his
theory of special relativity
, determined that the laws of physics are the same for all non-accelerating observers, and he showed that the speed of light within a vacuum is the same no matter the speed at which an observer travels, according to Wired.
What are the 3 laws of gravity?
The laws are: (1) Every object moves in a straight line unless acted upon by a force. (2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object’s mass. (3)
For every action, there is an equal and opposite reaction
.
What is Albert Einstein IQ?
A score of 135 or above puts a person in the 99th percentile of the population. News articles often put Einstein’s IQ at
160
, though it’s unclear what that estimate is based upon. … “Of course Einstein was the greatest theoretical physicist of the 20th century, so he must have had a superlative IQ.”
What does E mc2 mean in simple terms?
Einstein’s Big Idea homepage. E = mc
2
. It’s the world’s most famous equation, but what does it really mean? “
Energy equals mass times the speed of light squared
.” On the most basic level, the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.
Why is E mc2 wrong?
Einstein’s Second Mistake with E=MC. Einstein’s second mistake with his equation was in his failure to realize that the primary meaning of E=MC
2
is that
it defines the mass of the photon as the truest measure of mass
. … Planck’s constant is equal to the mass of a photon times its wavelength times the speed of light.
What is the first law of gravity?
Newton’s first law:
An object at rest remains at rest
, or if in motion, remains in motion at a constant velocity unless acted on by a net external force. Note the repeated use of the verb remains. We can think of this law as preserving the status quo of motion.
How does Newton’s first law apply to gravity?
The Universal Law of Gravitation (Newton’s law of gravity): 1.
Every mass attracts every other mass
. 2. Attraction is directly proportional to the product of their masses.
What is Newton’s 2nd law called?
Newton’s second law of motion is
F = ma
, or force is equal to mass times acceleration. Learn how to use the formula to calculate acceleration.
What is a gifted IQ?
The mean, or average, IQ is 100. A gifted child’s IQ will fall within these ranges: … Moderately gifted: 130 to 145. Highly
gifted: 145 to 160
.
Profoundly gifted: 160 or higher
.
What is Bill Gates IQ level?
| Name (First/Last) Description IQ (SB) | Bill Gates CEO, Microsoft 160 | Bill (William) Jefferson Clinton President 137 | Blaise Pascal Mathematician & religious philosopher 195 | Bobby Fischer Chess player 187 |
|---|
What was Nikola Tesla’s IQ?
Born during a lightning storm in 1856, Nikola Tesla went on to invent the Tesla coil and alternating current machinery. His estimated IQ scores range from
160 to 310
by different measures.
How do we use E mc2 today?
Many everyday devices, from
smoke detectors to exit signs
, also host an ongoing, invisible fireworks of E = mc2 transformations. Radiocarbon dating, which archeologists use to date ancient material, is yet another application of the formula.
Why is c squared?
Now we’re getting to the c2 part of the equation, which serves the same purpose as the star-on and star-off machines in “The Sneetches.” The c stands for the speed of light, a universal constant, so the whole equation breaks down to this:
Energy is equal to matter multiplied by the speed of light squared
.
