The Earth travels around the sun in an elliptical pattern, but it is still fairly close to a circular orbit. The seasons on Earth are determined by the angle of sunlight that hits the planet …

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## Gravity Potential Energy in Space

In space there is potential energy that is gravitational, similar in some ways to the potential energy associated with height on earth, but also different. Two objects must be present and the …

## Gravity Drilling to the Center of the Earth

If you were to drill a hole through the center of the earth the result might seem a little counter intuitive. Gravity decreases with distance, away from the earth, ie in outer space, and it also …

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## Newton Derives Universal Gravitation Constant and Mass of Earth

Skeptics did not believe Newton’s theories of gravitation to be true, but his figures proved valid. The radius of the Earth has been known since ancient times and the distance to the moon has also …

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## Natural Frequency Introduction

All objects that oscillate have something called a natural frequency. At this frequency they will experience resonance and start oscillating with increasing magnitude towards infinity, or in the case …

## Physics Mathematics Notation Euler Sine Cosine

When writing mathematical expressions, numbers and formulas that look quite different can mean the same thing. For instance, power series (an infinite series of terms added together) can be used to …

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