A star with a radius 1.5 times that of the Sun has a surface temperature T=9,000 K. Calculate the luminosity of this star and express your answer in units of the Solar luminosity

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A: Given:dimensions of the block, length, a = 20 cm = 0.20 mbreadth, b = 1.5 cm = 0.015 mheight, c =…

Q: 1. a bullet of mass = 5.00 g = 0.005 kg v = 300 m/s b 50.0 kg at 9.00 m/s c mass = 1.00 x 10³ kg…

A: The kinetic energy of m mass , moving at a velocity v is - Ek=12mv2

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A: Solution: To solve this problem, we can use the formula for the resistance of a solenoid: R = (4 *…

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A: mass of ice = 0.8 kg initial temperature of ice = -5oC mass of aluminum container = 5 kg Initial…

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A: Given Data :Distance travelled s = 50 minitial speed of the bus u = 5 m/stime t = 4 s

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Q: Question If a 3-C charge contains 3000 J of electric potential energy from its point in the field,…

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Q: 6.63x10-6 C/m is = A charged rod of length L 40.8 cm and linear charge density fixed with its axis…

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Q: A cart of mass 0.350 kg is attached to the end of a spring, with force constant 55.0 N/m, on a…

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Q: The battery shown in the circuit in (Figure 1) has some internal resistance. Figure www 1 of 1 Part…

A: Let the emf of the battery = E Let the terminal potential difference = V Let the current = I let the…

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A: we have: ε = 3.7 (given)A = 0.850 m^2 (given)d = thickness of paper = 1.2 mm = 0.0012 m (given) we…

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A: Fleming's rght hand rule: Hold your right hand so that your thumb, forefinger, and middle finger…

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Q: If a 0.6 Tesla magnet moves into a 138 turn coil with an cross sectional area of 0.32 in 0.8…

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Q: 9. A ball was kicked from the ground at a velocity of 22m/s in a direction making an angle of 25…

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Q: acceleration of block A during the first 5 sec,

A: Given: Mass of block A is mA=15 kg Mass of block B is mB=m Horizontal force applied to block A  is…

Q: 7. An airplane flying at 100 m/s dropped a box at an elevation of 200 m. (g = + 9.8 m/s^2). Consider…

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Q: Alexa and Jeremiah now work on a problem. A beam of protons enter the electric field of magnitude E=…

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Q: A spaceship is traveling through deep space towards a space station and needs to make a course…

A: Solution:                                  Ax =2.7×106Ay = 0Bx = 2.3×106 cos 70° km = 0.8×106 kmBy…

Q: An adventurous archaeologist crosses between two rock cliffs by slowly going hand-over-hand along a…

A: GIVEN                Max. tension rope can bear = Tmax.  =  3.00×104N              Mass (m) = 89.5…

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Q: Determine the magnitude and direction of the net electrostatic force on charge 1 if the two charges…

A: GIVEN             Q1= -2 nC             Q2= -1.5 nC

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Q: 2.) A satellite is launched into a circular orbit 40 x 10^5 m above the surface of the Earth. a.…

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Q: A circular coil of radius 0.120 m contains a single turn and is located in a constant magnetic field…

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Q: In the RC circuit below, Vs-8, R=49k2, and the capacitor =83 uF. if, initially, the switch is at…

A: The battery voltage is 8 V. The resistance is 49 kΩ. The value of the capacitor is 83 μF.

Q: Question What is the electric potential 0.543 × 10-¹4 m from a fragment that contains 5 protons?…

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Q: 3. Determine the magnitude and direction of the net electrostatic force on charge I if the two…

A: Given data:  Two charges q1 = -2 nC = -2×10-9 C q2 = -1.5 nC = -1.5×10-9 C Distance (r) = 1.3 m…

Q: Multiple-Concept Example 2 discusses the concepts that are used in this problem. In the drawing the…

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Q: If a 0.8 Tesla magnet moves into a coil with an cross sectional area of 0.26 in 0.5 seconds and…

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Q: 1. A crowbar lifts a weight in Fig. 10-21 below. A downward force on the long end of the crowbar,…

A: Moment of force (Torque): The moment of a force or Torque (ζ in N.m) about a point is a measure of…

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Q: Consider the circuit shown in the figure, where &₁ = 23.7 V, ₂ = 11.3 V, and R = 11.0 02. (Due to…

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Q: A woman bails out of an airplane at an altitude of 11,000 ft, falls freely for 25 s, then opens her…

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Q: Show that the third derivative with respect to time of the position vector (jerk) of a parti- cle…

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Q: A 24kg body moves with a velocity of 4m/s. Determine its kinetic energy.

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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.