Suppose a lump of ionized matter orbits a black hole with a period of 3.50 ms and an orbital radius of 140 km. What is the mass of the black hole? The mass of the sun is Ms = 1.99 x10^30 kg. (Give your answer in terms of the solar mass.)
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.
Suppose a lump of ionized matter orbits a black hole with a period of 3.50 ms and an orbital radius of 140 km. What is the mass of the black hole? The mass of the sun is Ms = 1.99 x10^30 kg. (Give your answer in terms of the solar mass.)
A projectile is launched directly upward from the surface of the Earth with an initial speed of 7.1 km/s. Assuming air resistance is negligible, what is the maximum height of the projectile (in m)?
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