A fly lands on one wall of a room. The lower-left corner of the wall is selected as the origin of a two-dimensional Cartesian coordinate system. The fly is located at the point having coordinates (2.05, 1.20) m. (a) How far is it from the origin (in m)? (b) What is its location in polar coordinates? (Enter r in meters and o in degrees.) m • counterclockwise from the +x-axis (c) What If? If the wall is 14.0 m long and 4.0 m high, which choice of origin would give the fly the largest distance from the origin? bottom left corner of the wall top right corner of the wall bottom right corner of the wall top left corner of the wall (4) What is the distance of the fly from this new origin (in m)?
Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.
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