What Is Physics?

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also, through technology based on laboratory discoveries, a transformation of society.”
Uncertainty in Measurements
Because the number of digits that are valid for any measurement is limited, the precision of all measuring devices is also limited. Every measurement is subject to uncertainty.
Causes of uncertainty:
1. temperature
2. magnetic fields
3. parallax
4. carelessness

Chapter 3:

General Principles of Temporal Displacement

In chapter 3, we learned that displacement is the change in position of an object. Because this interests me I decided to enlighten you on the subject of Temporal Displacement. The TARDIS is a powerful machine that allows temporal displacement from within the space-time dimension. It is most important that the operator of the TARDIS have a fundamental understanding of temporal displacement (‘time travel’) if he or she is to understand and successfully pilot the TARDIS. There are only four laws of time travel, but first you must understand the ...

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falling you yourself will be in free fall where there is a weightlessness feeling. Free fall is motion determined solely by gravitational forces. This is due to the fact that the only force acting on you is gravity. This acceleration is known as the acceleration due to gravity, represented by the letter g, which is equal to 9.8 m/s2 or 32 ft/s2. The acceleration due to gravity differs on each planet because of the different gravitational strength. On Mars the g is 3.3 m/s2. On Jupiter the g is 25.6 m/s2. On the moon the g is 1.67 m/s2.
As we know, the speed at which an object is falling during free fall can be determined, when started at rest, by this equation: v= g * ...

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