What is the name of the period in the Early Universe during which the Universe expanded very rapidly as a quantum system?   a. Inflation.   b. Cosmic Microwave Background.   c. Gravitational Collapse.   d. Big Bang Nucleosynthesis.

Q: Q22: The figure shows a vibration signal from a displacement transducer. The amplitude of the…

A: There are 10 wave in 0.1 s  So, 100 waves in 1 s  So, frequency is f = 100 Hz angular frequency =…

Q: A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with…

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Q: Determine the y component of the unit vector (magnitude of P=1) shown below. Write the numerical…

A: The unit vector P makes an angle of (90°-30°)=60° with y axis.

Q: An aluminum ring of radius r₁=5.00 cm and a resistance of 4.15 x 10-4 is placed around one end of a…

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Q: An object is descending toward the Planet X's surface (disregard air resistance). Its height is…

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Q: A wire of radius R carries a current I. The current density is given by the function J = Jo (1-r/R)…

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Q: m₁ = 4.00 kg a = 33.1° μs = 0.40 HK = 0.20 a) What is the maximum mass m₂ so that it will not go…

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Q: A sphere, centred on the origin, has radius 31.7 cm, and is spinning at 3 revolutions per second…

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Q: uppose that a bike is being peddled so that the front gear with radius r=4.0 inches, turning at a…

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Q: Determine the support reactions and all member forces for the truss below. Note that BD does not…

A: Given: figure of truss above To Find: support reaction and all forces acting on truss   FBD:

Q: Which of the following is NOT a reason for the very earliest ancient development of Astronomy…

A: The study of astronomy includes everything in the universe besides our planet's atmosphere. That…

Q: You are standing on a rooftop of a building, 70.0 high. You throw a stone directly upward at an…

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Q: Three children are trying to balance on a seesaw that is 3.2 m long. Two playmates are already on…

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Q: r leaning against the side of a house makes a 70.1° angle with the ground. a. How far up the side of…

A: GivenA 30-foot ladder leaning against the side of a house makes a 70.1° angle with the ground.

Q: Explain the 1st Law of Thermodynamics using a bicycle pump.

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Q: T₁ 15⁰ A B Fig. P2.6 and P2.7 25° T₂ A telephone cable is clamped at A to the pole AB. Knowing that…

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Q: 24.0 V 12.0 V Mi 4.00 (12 www 5.000 5.00 (1 www R₂4 (a) Can the circuit shown in the figure above be…

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Q: The wavelengths of the Lyman series for hydrogen are given by = R₁ (a) Calculate the wavelengths of…

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Q: a mass of 3 kg is attached to a massless spring with a force constant 500  n / m. The mass rest on a…

A: Givenmass, m=3 kgspring constant, k=500 N/minitial compression, x=30 cm   or 0.3 mso initially all…

Q: Vector A has magnitude 8.0 m at an angle of 30 degrees below the +x axis. They component of A is

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Q: hy doesn't the outside world appear blue even though so much light comes from the blue sky

A: The answer is given below ,

Q: A train horn has a frequency of about 150 Hz. If you are waiting on a bench at the train station as…

A: Here, we will understand the concept of doppler's effect -  For a source approaching observer, the…

Q: Use the definition of Avogadro's number to find the average mass of a phosphorus atom. kg

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Q: tabletop as shown in the figure below. (a) Determine the magnetic flux through the loop due to the…

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Q: on gas has a half-life of 3.83 days. If 2.92 g of radon gas is present at time t = 0, what mass of…

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Q: Two blocks, one with mass m and the other with mass 2m are pushed by constant forces of equal…

A: Given data:  Two blocks One has mass m and second has 2m Constant force = F Time interval (Δt) = 5.0…

Q: BALL IS THROWN VERTICALLY UPWARD WITH AN INITIAL VELOCITY OF 3m/sec FROM THE BALL STRIKES THE GROUND…

A: Note: Upward direction from the building is taken as positive and downward direction as negative u=3…

Q: A 71.04kg person rides in elevator while standing on a scale. The elevator is traveling upward but…

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Q: rod has a length 0.305m at 0°C. The length of the rod ncreases to 0.498 when the emperature…

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Q: question 2 A projectile is launched straight up in the air. Its height (in feet) t seconds after…

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Q: A 70 gg mass is attached to one end of a 10-cm-long spring. The other end of the spring is connected…

A: Given data: The mass attached to the spring is m=70 g=0.07 kg. The length of spring is l=10 cm=0.1…

Q: m₁ The figure shows two carts before a collision; cart m₁ is moving with velocity vo toward cart m₂…

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Q: In cylindrical coordinates (p, d, z), the vector potential A OB= OB= OBE Hol 2sp 2 B = P 1T 147 In p…

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Q: Suppose the angles shown in Fig. 5.31 are 60° and 20°. If the left-hand mass is 2.1 kg, what should…

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Q: A solenoid with 100 turns and a cross sectional area of 20 cm² has a magnetic field of 0.60 T along…

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Q: On a map with 1 cm = 3000 m scale, what is the equivalent ground length of a power transmission line…

A: scale used on map : 1 cm = 3000 m Length of power transmission line on map = 5.25 cm To find : The…

Q: Assume there is a current of 3.0 A traveling clockwise in a loop around the four sides of a piece of…

A: Given: Current in the loop = I=3.0 A Width of the loop = 22 cm length of the loop = 28 cm current on…

Q: The frequency of a light wave is 5.0 x 10^14 hertz. What is the period of the wave? a. 6.0 x 10^-7 s…

A: Given data:  Frequency (f) = 5.0×1014 Hz Required: Period (T)

Q: If you live at a location on the Earth’s northern hemisphere, when will the longest day of the year…

A: Given: Earth's Northern Hemisphere  Big Bang theory To Find: which of the options are correct

Q: A wheel whose radius is 0.67 m is rotating at a constant angular speed of 6.7 rad/s. Determine the…

A: Given data:  Radius (r) = 0.67 m Angular speed (ω) = 6.7 rad/s Required: The linear speed (v)

Q: Two blocks, one with mass m and the other with mass 2m are pushed by constant forces of equal…

A: This problem can be solved using the formula of linear momentum.

Q: 3. A 30-kg box is sitting on an inclined surface as shown. The coefficient of static friction…

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Q: A ball rolls horizontally off the edge of a cliff at 7.00 m/s. If the height of the cliff is 50 m,…

A: Given data as per question   height   =  50m

Q: swings 14.64-K8 t, as the drawing shows. (a) Using the principle of conservation of mechanical…

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Q: Question 17 Three objects of different masses are weighed on a newly discovered planet. Object…

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Q: The current in the wire is given by the equation 1 = 2.5-0.6t, with positive to the right as shown.…

A: Given Current in a straight wire I = 2.5 - 0.6t It move in the right direction as shown in the…

Q: 10. Suppose you have a sphere with a surface area of about 1.3 m². If the temperature of the sphere…

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Q: s on a uniform board of weight 300 N and length 15 metres.      The board is supporte

A: GivenWeight of person=750 Neight of board=300 NLength of board=15 m

Q: Two plane mirrors are facing each other. They are parallel, 3.00 cm apart, and 17.0 cm in length, as…

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Q: A Which electromagnetic waves have the longest wavelengths and lowest energy? B C D gamma rays…

A: To find - Which electromagnetic waves have the longest wavelength and lowest energy? As we know, the…

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.