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# Tag Archives: Galileo Galilei

## Gravity and Galileo

How Galileo gave acceleration due to gravity before Newton discovered gravity . exactly what happen Newton stated the Universal Law of gravitation and explained why objects fall to earth when dropped.

But objects were falling even before Newton explained it.

The concept of speed and velocity was known before the Law of Gravitation was formulated. ## How is quantum simultaneity compatible with relativity?

When an entangled particle “collapses”, physics says that the other particle collapses simultaneously.

But that’s non compatible with relativity, which says that simultaneity depends on the place and velocity of the observer. Events A, B, and C occur in different order depending on the motion of the observer. The white line represents a plane of simultaneity being moved from the past to the future. (Photo credit: Wikipedia)

So the question is:
– How can quantum disentanglement simultaneity be compatible with relativity? Do the entanglement state is dependent on the observer, in the mean that a pair of particles can be entangled for one observer and collapsed to other?

Awaiting response from visitors ## Some Physicists and their contributions

Physicists outside India

• Galileo – (formulated the basic law of falling bodies, constructed a telescope and discovered four moons revolving around Jupiter)

• Archimedes: Archimedes Principle and theory of floatation, Principle of levers)
• Albert Einstein: Theory of relativity, (Special and General)
• Isaac Newton: Laws of motion, The method of Calculus
• Michael Faraday: Electromagnetic induction, dynamo

Physicists from India ## Equilibrium – Numerical Problem

SOLID HEMISPHERE OF RADII R EACH, are placed in contact with each other with each other with their flat faces on a rough horizontal surface. A sphere of mass m and radius R is placed symmetrically on top of them. The normal reaction between the top sphere and any hemisphere assuming the system to be in state equilibrium is ### Hits so far @ AskPhysics

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