Description: Imagine you are comparing the five electric hot plates (A – E) of different sizes and temperatures. The temperature of each hot plate is indicated by a shade of gray such that the lighter the shade of gray, the higher the temperature of the hot plate. D B E A A. Ranking instructions: Rank the surface area (from largest to smallest) of the hotplates. Ranking Order: Largest 1 3 4 5 Smallest Or, all the hotplates have the same surface area. (indicate with a check mark) Carefully explain your reasoning for ranking this way: B. Ranking instructions: Rank the temperature (from hottest to coldest) of the hotplates. Ranking Order: Hottest 1 2. 3 4 5 Coldest Or, all the hotplates have the same temperature (indicate with a check mark) Carefully explain your reasoning for ranking this way:
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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