Examples of deficit in a sentence. 1  The government is facing a deficit of $3 billion. 2  We will reduce the federal budget deficit. 3  The team overcame a four-point deficit to win the game.  She has a slight hearing deficit in her left ear.
The larger objects is at one of the two foci. For example, the Sun is at one of the foci of Earth's elliptical orbit. If the eccentricity of an ellipse is large, the foci are far apart. If the eccentricity is small, the foci are close together.et's take a look at the mathematical definition of an ellipse. First, place two points on a plane; these will be the foci of the ellipse. Now, pick a distance that is larger than the distance between the two foci. We'll call that distance 2a, for reasons that will become clear in a minute.
An orbit is the path followed by a planet according to Kepler's  laws, which are very accurate but not exact. Size, speed and period  are all related by simple formulas so t â¦ hat if you know one you can  find out the other two.   The orbit is an ellipse and the size is usually measured by its  mean radius, also called its semi-major axis, which is the average  of the maximum and minimum distances.f the Earth's orbit were a circle, the length of the orbit would be the circumference, C=2 pi r. 2 * pi * (149 600 000 kilometers) = 939 964 522 kilometers Since the orbit is more nearly an ellipses, we could approximate the circumference as C= pi (a+b), but that does not actually improve the accuracy.