Relate hydrostatic equilibrium to the star's mass, composition, and evolution off the main sequence.

Q: Calcylate The momentum of car that had tな of 17.0m/s. mass o 1550 kand f 'd velocity

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Q: 2. Two point charges of 50 nC each are located at points A(1, -2, 4) and B(-1, -3, 6). Find the forc...

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Q: A moving coil galvanometer has a coil with 175 turns and area 1 cm2. It uses a torsion band of torsi...

A: Given  No of turns, N = 175  Area of coil, A = 1 cm2   Torsion constant, C = 10-6 N-m/rad   deflecti...

Q: Study the free-body diagram below and choose the statement that best describes the object's motion N...

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Q: A plastic disk of radius R = 60.0 cm is charged with a surface charge density uniform σ = 7.00 fC/m2...

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Q: The figure below shows a bullet of mass 15 g traveling horizontally towards the east with speed 250 ...

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Q: A particle travels along a straight line to the right with a velocity of v = 4t -3t2 where t is in s...

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Q: Calculate I,, 12, 13,14, I5 and I6. R1 = 1 kN R2 = 1 kN R3 = 3 kfN Rs 6 kN R6 >6 kfN 28 V + R4 Is 5 ...

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Q: When operated on a household 110.0 V line, typical hair dryers draw about 1650 W of power. The curre...

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Q: a = (2, -4, 4), b = (4, 0, 3) and c = a × b, what is the magnitude of c?

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Q: Derive an equation that relates the positions of the bright maxima from a diffraction grating to the...

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Q: The remains of a 99 million year old beetle have been discovered, perfectly preserved, in amber. Ass...

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Q: A laser emits 6.85 x 1018 photons per second in a thin beam with circular cross section having diame...

A: Power p= energy/ time. Power developmed by 1 photon. Time t = 1 sec P = E/t. P= hC/wavelength *t. P ...

Q: 1- What time is it when the hour angle is 30°.

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Q: The world record for the men's high jump is 2.45 m. To reach that height, a) what is the minimum amo...

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Q: A tank of volume 0-2 m contains helium gas at a temperature of 300 K and pressure 1 x 10 N/ im?. Fin...

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Q: Assuming a successful man-made satellite rotates around the earth at a rate of 5.2 rev in 9.4 days. ...

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Q: also, make a free body diagram

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Q: You take a three-day hiking. On the first day, you travel 5.0 km heading east. On the second you e...

A: Write the position vector on the first day. Write the position vector on the second day.

Q: Light traveling in first medium with a speed of 1.5x108 m/s, strikes the surface of a transparent ma...

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Q: A current of 5 A passes through a copper conductor (resistivity = 1.7 x 108 om) of radius of cross-s...

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Q: A piece of stone is thrown vertically upwards. It reaches the maximum height in 3 seconds. If the ac...

A: Given: The time taken by the stone to reach the maximum height is 3 s. The acceleration due to gravi...

Q: A ball is released from the top of a tower of height h meters. It takes Tseconds to reach the ground...

A: Ball takes T seconds to reach the ground from a top of a tower of height h. Position of the ball at ...

Q: Calculate the equivalent resistance Rab at terminals a-b in the circuit of the figure below. 102 ww ...

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Q: mass 10. kg is pulled with a force of 30. N in the right direction at an angle of 30. degree with re...

A: givenm=10 kgF=30 Nθ=30°μ=0.2

Q: an object sinks when it displaces a volume of liquid that has a weight

A: If an object is submerged in a liquid the buoyant force (= weight of liquid displaced by the object)...

Q: We calculated the range for a projectile that lands at the same elevation from which it is fired as ...

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Q: For the following projectile find the time to travel from A to B. VO 60° 3m YB 1m 10m

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Q: A hydroelectric power plant operates at its rated power of 7 MW. If the plant has produced 26 millio...

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Q: If the mass of the swimmer is 50kg. a. Potential Energy at the Top is = J b. Velocity of the swimmer...

A: We have a swimmer of mass m=50 kg drop (initial velocity u=0) from a height of h=15 m. We need to fi...

Q: A beam of light containing red and blue light is incident on a 45° - 90° - 45° prism, as shown. The ...

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Q: Is there any vector that is perpendicular to itself? Provide an example if there is, and if there is...

A: Zero vector is perpendicular to itself

Q: A volcano erupted and spit a rock in the atmosphere at an angle of 35 degrees with the horizontal wi...

A: In this question we have to find the horizontal velocity of the rock. Please give positive feedback ...

Q: 1- What time is it when the hour angle is 30°.

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Q: Two long, parallel wires separated by 2.90 cm carry currents in opposite directions. The current in ...

A: Given that                 The separation between the wire is (r) = 2.90cm = 0.029m                 ...

Q: 3. The charges q1 = 2.0 nC, q2 = 4.0 nC, and q3 = -1.0 nC are placed at the corners of the triangle ...

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Q: In absolute index of refraction, n1 is:   A. Air B. Another medium C. Water

A: Refractive index is the ratio of speed light and velocity of the medium.

Q: he figure represents a thin conducting loop placed in a uniform magnetic field directed perpendicula...

A:  According to faraday Law the voltage induced in a coil is equal to rate of change of magnetic flux ...

Q: The oil is heated to 700 C. It cools to 500C after 6 minutes. Calculate the time taken by the oil to...

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Q: Three point particles of masses 1.0 kg, 1.5 kg and 2.5 kg are placed at three corners of a right ang...

A: Given data :- Assuming that mass of 1 kg is situated at the origin i.e., at (0,0) then we have- Coor...

Q: What role does friction play in the conservation of energy?

A: Friction - When surface of one object moves on the surface of other object then a resistive force be...

Q: 3. An object is thrown with an angle 370 with horizontal. If the initial velocity of the object is 5...

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Q: A long solenoid that has 1,140 turns uniformly distributed over a length of 0.415 m produces a magne...

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Q: A centrifuge in a biology laboratory rotates at an angular speed of 3,500 rev/min. When switched off...

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Q: a. What is the acceleration for the first 10 seconds?  b. What is the acceleration for the from 10 s...

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Q: On a frictionless surface, a man wants to move forward, can it move forward? Explain

A: The answer is below

Q: Two particles with masses 2m and 8m are moving toward each other along the x axis with the same init...

A: Given, mass of the particles, 2m and 8m initial speed of the particle moving in the opposite directi...

Q: 2. Determine the acceleration of the box a. ? ,200N M- 21ky 40

A: Part (2): Given: The mass of the object is 29 kg. The coefficient of friction is 0.29. The applied f...

Q: a student rings a bell with the frequency of 100 hz  the sound  wave travels through brass air and  ...

A: We know Relationship between frequency and wavelength is  fL = V  Where f = frequency of the wave  L...

Q: QI a) A cylindrical glass rod in air has index of refraction 1.52. One end is ground to a hemispheri...

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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.