The temperature of the CMB today is T=2.725 K. Calculate the temperature of the CMB at redshift z=2000

Q: 3. Equal 0.750 kg masses of lead and tin at 65.0°C are placed in 1.00 kg of water at 18.0°C. What is…

A: 3) The specific heat of water, lead, and tin are given by,

Q: A small telescope has a concave mirror with a 2.6 m radius of curvature for its objective. Its…

A: Given, Radius=2.6m Focal length=3.4cm

Q: SHOW ALL WORK, PLEASE Prove that the electric field inside of a hollow sphere is 0.

A: The electric field inside of a hollow sphere is zero

Q: i,A garden is rectangular being 22 m wide and 45 m long. How long is a line drawn from one corner to…

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Q: A wire with a weight per unit length of 0.075 N/m is suspended directly above a second wire. The top…

A: Write the given values with the suitable variables. FL=0.075 N/mI1=29.5 AI2=60.7 A Here, FL, I1, and…

Q: How many beats of music are used in a Basic Salsa Step and how many transfers of weight (steps) are…

A: In salsa the basic step is done quick-quick slow quick quick rhythm on beats 1-2-3, 5-6-7 of 8 count…

Q: What is the threshold antineutrino energy for the Glashow resonance in peta electronvolts (PeV)?

A: In this Very-high-energy astrophysical neutrinos with IceCube. One event was found with a visible…

Q: The acceleration due to gravity on the surface of the moon is 1.7 m/s. What is the time period of a…

A:

Q: 4.88 The vector V = 10xi – 10yj represents a two-dimensional velocity field. Is the flow…

A: The answer is below

Q: Problem 8: The magnetic field of an electromagnetic wave is described by B, = Bocos(kx - wt), where…

A:

Q: Consider a 0.19 cm focal length microscope objective that is 0.28 cm from the object being viewed.…

A: Consider a 0.19 cm focal length microscope objective that is 0.28 cm from the object being viewed.

Q: 6.91 A valve at the end of a gasoline pipeline is rapidly closed (assume it is closed…

A: Initial velocity=12m/s Bulk modulus=715mpa

Q: Guitar strings are tuned to 6 frequencies by selecting the string material's mass/length and…

A: Guitar strings are tuned to 6 frequencies by selecting the string material's mass/length and…

Q: A car travels along the three legs of an equilateral triangle. The speed for the three legs is as…

A:

Q: Through which laws were Kirchhoff's two famous law derived?

A: Some closed-loop circuits are impossible to study using a sum and/or series of components.…

Q: is moving from the rest and reach a

A: We know that the first equation of motion is given as   v= u+at  here v is the final velocity  u is…

Q: What musical term describes an accented pickup?

A: Answer:-  Syncopation in music the displacement of regular accents associated with given metrical…

Q: A conducting sphere of radius 8.0 cm carries a uniform volume charge density of 500 nC/m³. What is…

A:

Q: A car is moving on a straight road 10.5 m/s. It is acceleration at 22 m/s² . What will be it's…

A: Given data :   Acceleration  =   a   Time  =  t   Initial velocity  =  u      To find :…

Q: equilibrium A B C 41. A box on a spring is pushed to point A and allowed to oscillate. Describe the…

A: At A and C the box will have 0 or minimum velocity but maximum acceleration as the box will…

Q: 4. [8pt] Assume the three docks (m1=2 kg, m2 = 3 kg, m3=1 kg) portraye d in the ri ght a…

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Q: 2. Block A in the figure weighs 100 N, p = 0.35 and W = 30 N. The system is in equilibrium. a) Find…

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Q: Which of  the following electromagnetic waves has the lowest frequency?   a. Microwaves   b. FM…

A: Given data:  Electrostatic waves Required: Wave that has the lowest frequency

Q: 61. (a) Determine the acceleration of the center of mass of a uniform solid disk rolling down an…

A: We have to find the acceleration of centre of mass

Q: 1. A 5.00 kg block is sliding down an inclined plane with a constant speed. The block comes to rest…

A: We know that We have a 5.00 kg block is sliding down an inclined plane with a constant speed. The…

Q: 5.33* A 6-cm butterfly has to be projected onto a screen positioned 1.20 m away so that its image is…

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Q: Consider the following questions regarding plane mirrors. (i.) Is the image formed by a plane mirror…

A: Plane mirror: A plane mirror is a flat reflective surface that reflects the incident ray on the same…

Q: Question: If a current of 64 A is running through point a, what is the potential difference between…

A: Given data:  Current through point a (I) = 64 A Resistance (R1) = 6.7 Ω Required: Potential…

Q: 1. As the temperature of a solid increases, its specific heat А. increases С. increases, then…

A: 1) The specific heat of solids depends on the number of molecules that the solid contains. It does…

Q: Activity 2. Electric Field Analysis Use arrows to represent the electric fields at points A, B, and…

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Q: You are given a spherical mirror and wish to determine its properties. You place an object on its…

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Q: An electromagnetic wave strikes a 1.83-cm2 section of wall perpendicularly. The rms value of the…

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Q: A series RLCRLC circuit consists of a 260 ΩΩ resistor, a 25 mHmH inductor, and a 12 μFμF capacitor.…

A:

Q: A fossilized leaf contains​ 70% Of its normal amount of​ carbon- 14. How old is the​ fossil? Use…

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Q: A 5 kilogram ball compresses a 0.4 m spring and is then freed from rest. It falls from a…

A: The ball of mass 5 kg is initially held against a spring at rest, compressed to a distance of 0.4 m,…

Q: R, = 122 R2 = 6n V, = 6.0v R3 = 22 V3 = 6.ov R4= 3n Vz = 4,0v

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Q: What is the minimum area (in square meters) of the top surface an ice slab 0.417 m thick floating on…

A: Write the expression for the volume of ice.

Q: A 1.20 kg block hangs from a spring. A 240 g body hung below the block stretches the spring 2.30 cm…

A: The spring in the given problem has a mass of 1.2 kg initially hanging off it. When this mass is…

Q: Solve the following problems and show your solutions. 1.Convert 300 rpm to rad/s 2. What is the…

A: Considering 1 revolution = 2 pi radians , and 1 min = 60 sec the desired results can be obtained.

Q: For an isolated system where two masses collide in two dimensions (2D), check all TRUE statements:…

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Q: When light passes through the glass block shown below, it is shifted laterally by distance d. The…

A: Given that                     The refractive index of the glass(n2) = 1.5                     The…

Q: The figure below shows a spherical hollow inside a lead sphere of radius R = 4.00 cm. The surface of…

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Q: An object with a mass of 10 kilograms slides down an inclined plane with an angle theta=30 degrees.…

A: Please note : As per answering guidelines I can answer the first question only. Since, this is not a…

Q: if the velocity of the moving body is doubled, what does this do to kinetic energy and momentum of…

A:

Q: 55. Review. An object with a mass of m = 5.10 kg is L Mattached to the free end of a light string…

A: Given, Mass=5.1kg Radius=0.250m

Q: Q1. The magnetic flux passing perpendicular to the plane of the coil directed into the paper is…

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Q: 2. A series RLC circuit consists of a 100 2 resistor, a 0.15 H inductor, and a 30 µF capacitor. It…

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Q: 1. Heat energy travels from an object with a high __________. * a. internal energy to an object…

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Q: 2.00 kg and a block of 6.00 kg are connected by a massless string over a pulley in the shape of a…

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Q: Find the activity A of a sample containing 4E-6 g of 60/27 Co (T1/2= 5.27 years). (Use 59.93 u as…

A:

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.