we have this problem in our class today that left me puzzled. here it is Lets say i have a rod. and this rod has a length of 50 cm lol. lets say this rod has a nonuniform density. 2=A+BVx lets say lambda is measured in g (gram) per m (meter) and x would be measured in m. A = 50 g/m B = 25 g/m^3/2 %3D FIND:: a. need to find the dm for this one shape b. get the mass of our rod c. get the centre of mass of our rod
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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