A star is observed to have a parallax of 0.0015".  What is the distance to the star in  units of AU?

Q: A weather station releases a balloon whose buoyancy accelerates it at 15 m/s². At the same time, a…

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Q: A converging mirror has a focal length of f=18cm.  a. Where must an object be placed in order to…

A: GIVEN             focal length of Converging mirror f=18cm.

Q: 2. Two objects exert a gravitational force of 4.0 N on each other. a. If the mass of one object is…

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Q: A rigid body moving in R2 has three degrees of freedom (two from trans- lation and one from…

A: It is required to obtain that an n-dimensional rigid body has n2n+1 degrees of freedom.

Q: 1000 cm³ 4. Assume the balloon is replaced by a 0.5 Kg piece of wood that has exactly the same…

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Q: An object is placed 14.0 cm away from a concave, spherical mirror whose radius of curvature is 10.0…

A: The distance of the object from the mirror is 14.0 cm. The radius of the mirror is 10.0 cm.

Q: When a 78.0 kg skateboarded passes point P, his mechanical energy is 3.68 x 10^3 J relative to the…

A: Answer the following question is

Q: Two blocks are positioned on surfaces, each inclined at the same angle of 44.5 degrees with respect…

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Q: An object of mass m, on an incline plane slides down because of the force: O Friction between the…

A: Answer:

Q: Question 2, During a physics lab, Christina set up a pendulum that oscillated as shown below. When…

A: The total mechanical energy is the sum of kinetic and potential energy .

Q: A cylindrical (7.000x10^0) µF capacitor is connected to a power supply and is charged from zero to a…

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Q: equipotential surfaces a

A: Given: Charge is q=2.96 μC Equipotential surface exist at a distance 1.83 m from given charge.…

Q: A car is traveling on a level road with speed v0 at the instant when the brakes lock, so that the…

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Q: knowing that an elevation of 3200m above sea level; the pressure is about 70kPa: Explain why the…

A: As the height increase from the ocen surface the pressure decreases, which decreases the boiling…

Q: A small conducting ball that carries a charge of 30.0 nC is located at the center of an electrically…

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Q: noah is travelling home after work and drives his car 7.50 km due west and then turns north and…

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Q: Minute to win game that would address physical fitness issues like obesity, being overweight or any…

A: A Minute to Win game that can help address physical fitness issues like obesity, being overweight or…

Q: The AM band extends from approximately 500 kHz to 1,600 kHz. If a 1.5-μH inductor is used in a…

A: Given data: The minimum frequency is fmin=500 kHz. The maximum frequency is fmax=1600 Hz. The…

Q: You must push a crate across a floor to a docking bay. The crate weighs 194 N. The coefficient of…

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Q: Light is traveling through air and hits an iceberg (n = 1.31) at an incident angle of 30.0 ̊. What…

A: given  n=1.31, θi = 30°   (angle of incident)

Q: Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 95.0 kg, down a 0 =…

A: Given data: The total mass is m=95 kg. The inclination of slope is θ=70°. The coefficient of…

Q: In the given figure below, both masses m1 and m2 are attached with a string. Mass m1 is moving on…

A: Both masses are connected by the same string, one is moving towards right on the horizontal table…

Q: A 20 kg falling object experiences 5 N of air resistance. What is the acceleration of this object?

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Q: magnitude of the impulse on A is equal to the magnitude of the impulse on B

A: Given: Mass of ball A is mA=100 g Mass of ball B is mB=300 g Both balls collide with each other.…

Q: ) A crane used to lift a 975 kg bucket of concrete operates at an efficiency of 29.8%. If the…

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Q: Ω·J assume they are all correctly written) listed on the front page, show that (ohm-joule per volt…

A: Answer the following question is

Q: Same situation as in the previous problem this time the magnet has mass 5.13 kg, the force pulling…

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Q: Two blocks are positioned on surfaces, each inclined at the same angle of 40.9 degrees with respect…

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Q: Americium -241 emits alpha particles with energy 5.485 MeV and 5.443 MeV. Calculate the frequency of…

A: Given, The energy of an alpha particle, E2=5.485 MeV, E1=5.443 MeV Planck's constant, h=6.626×10-34…

Q: eigning plane angle e plane, the coefficient of static friction is 0.290, and the coefficient of…

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Q: 23. A 1000-kg car moves west along the equa- tor. At this location Earth's magnetic field is 3.5 x…

A: To solve this problem, we need to use the formula for the magnetic force on a charged particle: F =…

Q: . A solenoid is wound with 2100 turns per meter. When the current is 4.2 A, what is the magnetic…

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Q: Two blocks connected by a light horizontal rope sit at rest on a horizontal, frictionless surface.…

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Q: How many joules of heat are required to melt 1.7 g of copper at a temperature of 1083 degrees…

A: Given that mass of copper m=1.7 gram  Temparature T=1083 °C Specific heat of copper C= 390 J/kg°C=…

Q: What is the capacitance of a planet that has mass (5.600x10^23) kg and a diameter of (8.6x10^6) m?…

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Q: The output voltage of an AC generator is given by Av = (1.10 x 10 V)sin(41лt). The generator is…

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Q: 1. A particle is confined in a region 0≤x≤ and has a wavefunction of the form = Ne-xa (a) Normalize…

A: Since you have posted multiple questions with multiple sub parts, we will provide the solution only…

Q: A 28 kg steel block sits on a lubricated steel floor. What is the maximum amount of static…

A: Given, mass of  steel block is m =  28 kg stell block is situated on the lubricated steel floor.…

Q: Consider an electron moving down in a uniform magnetic field as depicted below. How will its…

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Q: You take a ride on a carousel with some friends. The distance from you to the vertical axis of…

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Q: A linear accelerator has a bundle of electrons travelling North. The bundle experiences acceleration…

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Q: Consider the situation depicted below, where three closely spaced wires are carrying currents of…

A: Calculate the net current. Inet=I1+I2+I3Inet=−1.2 mA+4.1 mA−1.9 mAInet=1.0 mA Here, the positive…

Q: Some light bulbs are connected in parallel to a 120 V source. Each bulb dissipates an average power…

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Q: I) A revolving door consists of a four identical panels mounted to a solid column. Each panel has a…

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Q: current through the 4W and 60W bulbs running on a house voltage of 120V

A: Given: Voltage is V=120 V Power of bulb 1 is P1=4 W Power of bulb 2 is P2=60 W Note: 1 A=1000 mA…

Q: What is the speed of an automobile in meter per second which travels 15 km in seven hours?…

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Q: Determine the attractive attraction between the sun and Mercury if the sun's mass is 1.99×10^30 kg,…

A: Given data : Mass of sun, Ms=1.99×1030 kg Mass of mercury, Mm=3.3×1023 kg Distance between the Sun…

Q: A moon is observed to orbit a planet with a period = 3.551 days and at a distance = 670,900 km from…

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Q: In PreLecture 21B, the net electric field from an electric dipole for a point on a perpendicular…

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Q: velocity of the proton in units of km/s

A: Given: Mass of proton is m=1.673×10-27 kg Charge on proton is q=1.6×10-19 C Radius of path is r=4.46…

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.