A projectile hits the ground at an angle of 30 degrees below the horizontal with an energy of 113715 Joules. The mass of the projectle is 0.7kg. Assuming that this projectile was launched from the ground some distance away, determine thet horizontal and vertical velocity components at the launch. Let the acceleration due to gravity be 9.81ms 2. NOTE: sometimes rounding errors can produce slightly different answers, choose the nearest set of values if your answers don't match exactly. O Horizontal Velocity = 496.3 m/s and Veritcal Velocity= 285.0 m/s O Horizontal Velocity = 495.0 m/s and Veritcal Velocity=283.6 m/s Horizontal Velocity = 493.6 m/s and Veritcal Velocity = 285.0 m/s Horizontal Velocity = 493.6 m/s and Veritcal Velocity = 280.5 m/s
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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