The apparent V magnitude of Sirius is -1.44. What is its distance in parsecs? Use your estimate of its absolute magnitude from question 1. d = pc

Q: Which do you think has more magnetic force if powered with a current of 6 A? Electromagnet A has 300...

A: The magnetic field produced by a solenoid can be found using the formula: B=μNIL. Where 'N' is the t...

Q: When Jenny couldn't lift a box by herself, she decided to use a lever to move it. She placed a fulcr...

A: GivenFulcrum placed at 1.6 m away from boxlength of lever used 2.0 m

Q: Light of wavelength falls on a metal having work function hc Photoelectric effect will take place on...

A: Write the Einstein equation of the photoelectric effect.

Q: If a barchall ie thiawn at 70 m/s and what force 1X itx ditrectinn 0.60 k to maek js chunge neceas

A: Given data :            Acceleration = a                Mass = m      To find :            Force

Q: The figure below shows the equipotential surfaces of a parallel plate capacitor. If a positive charg...

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Q: Problem 9: A 10,000-m runner competing on a 400-m track crosses the finish line after completing a r...

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Q: Problem 13: Consider the acceleration versus time for a particle undergoing one-dimensional motion, ...

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Q: 20. The dimensions of Planck's constant is same as that of (a) angular momentum (b) linear momentum ...

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Q: A race car runs three complete laps around a 180 - m track in a total time of 15 min. What is the av...

A: Given: The length of the circular track is 180 m. The number of the laps is 3. The total time taken ...

Q: figure below shows an initially stationary block of mass m on a floor. A force of magnitude F = 0.51...

A: We know that let the mass of the block is m. The pushing force F is applied at an upward angle of 19...

Q: 1. The current supplied to an air conditioner unit is 4.5 amps. The air conditioner is wired using a...

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Q: An object's position as a func of time is given by ; x(t) = - 200 (( t + 1 ) ^ - 1) + 6t^2.  (Assume...

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Q: A simple circuit is constructed such that 307.7 Volts is measured across a 1,469.1 Ohms resistor. De...

A: Given data:  Voltage (V) = 307.7 V Resistance (R) = 1469.1 Ω Required: Current (I) 

Q: A "sound" like a musical note exists A. in the oscillating air molecules B. only in the brain of the...

A: Correct option is  (c) i e in the oscillating object that creates the sound wave. 

Q: In the Figure below, find (a) the current in each resistor and (b) the power delivered to each resis...

A: V1 = 18 volts R1 = 8 ohm R2 = 5 ohm R3 = 11 ohm R4 = 7 ohm R5 = 5 ohm V2 = 12 volts V3 = 36 volts  

Q: What is the magnitude of the resultant of vectors A = 10 units 30 degrees North of East and B = 20 u...

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Q: A sprinter performs a 100 m dash. During the initial s30 = 30m he accelerates, obtaining an average ...

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Q: 2) Draw Field Lines 2+ 2+

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Q: In this problem consider the object a 2 dimensional square in 2 dimensional space so all field lines...

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Q: Find an expression for the velocity of the particle as a function of time. (Use any variable o m/s D...

A: We know that the vector position of the particle varies in time is given as  r→= 5.60i^-5.80t2j^  . ...

Q: 3. A rod of length L lies along the x axis with its left end at the origin, as shown. It has a nonun...

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Q: JC-21) Planck's Constant from Data When sodium metal is illuminated with light of wavelength is chan...

A: To solve this problem we will use Einstein's photoelectric equation. This equation will provide a re...

Q: An initially neutral conducting sphere has a radius R = 0.45 m. Electrons are fired towards the sphe...

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Q: Shown is a series of position-time data for the first 400ms of a hand during a reach. Displacement o...

A: Time Current horizontal position (x) Current vertical position (y) Velocity (x) Velocity (y) Resulta...

Q: - Consider p-V diagram for an ideal gas shown in figure. PA 1 Constant V V Out of the following diag...

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Q: Dimensions of the resistance in an electrical circuit in terms of dimension of mass M, length L, tim...

A: R =VI=Electric field×distancecurrent=Forcecharge×distancecurrent=Force×distanceCharge×current=Force×...

Q: Watch Video OET 17.2 on slide 5 of the lab packet. The balloon in the video is charged after being r...

A: Given : (Note : This is a multiple type question. Pleased post the second one as a separate question...

Q: 3 If charge Q is a positive charge, then the electric field E is directed radially _______________. ...

A: Electric field is a vector quantity whose direction is defined as the direction that a positive test...

Q: A 300 turns circular loop of wire carry a current of 1.2 A. It is placed in a magnetic field of 0.2 ...

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Q: What evidence do you see that Newton’s third law applies to electrostatic forces?

A: We can see Newton's third law's various examples in electric forces . Newton's third law states tha...

Q: A solid disc of mass 18.9 kg and radius 2.75 m rotates horizontally around an axis through its centr...

A: Given Data: The mass of the solid disc: m=18.9 kg The radius of the solid disc: r=2.75 m The tangent...

Q: The correct graph verifying Hooke's law is Load Load (a) (b) Load Load (c) (d) Extension Extension E...

A: Given: The correct graph verifying Hooke's law is

Q: Consider the following mass distribution where the x- and y-coordinates are given in meters: 5.0 kg ...

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Q: her feet person scuffing a dry day - 42 mC.How many on wool rug a ccum ulates a On net charge of ex ...

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Q: Problem 12: Use the position vs. time graph shown in figure to the right to answer the following que...

A: The velocity is given by the slope of the line in the position-time graph.

Q: If vector B is added to vector Ā , the result is 5î-î. If B is subtracted from À , the results is î+...

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Q: A constant force of 60N is applied to a 25 kg block for 15 seconds. (a.) What is the impulse acting ...

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Q: A body at a temperature of 100°F is placed in a room at a constant temperature of 0°F. If after 20 m...

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Q: The flux received at the Earth from Supernova 1885 was 3.0182 x 10 10 W/m?. The luminosity of the su...

A: flux (I) = 3.0182×10-10 Wm2luminosity = 6×109 solar luminosities  

Q: A spy satellite is in circular orbit around Earth. It makes one revolution in 9.20 h. Mass of Earth ...

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Q: - An object that is initially traveling with a velocity of 20.0 m/s i is subject to a constant ccele...

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Q: What is the CORRECT statement about Faraday's law of induction? a. The emf produced in a loop of wir...

A: Faraday law od induction says that emf produced is proportional to the rate of change(time variation...

Q: (a) its average velocity; (b) its average acceleration. 3) Personnel at an airport control tower tra...

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Q: A freely rotating satellite leaves the cargo bay of the space shuttle. The satellite makes 2 complet...

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Q: Part A A = -2.00î + 6.003 and B= 5.00å – 3.003. Express your answer in degrees. ANSWER: Part B A = 2...

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Q: You are on the edge of a building roof, 50.0 m above the ground. You drop a ball toward the ground. ...

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Q: Part A You throw a rock straight up from the edge of a cliff. It leaves your hand at time t = 0 %3D ...

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Q: The wire carrying 325 A to the motor of a commuter train feels an attractive force of 3.20 x 10-3 N/...

A: Given Current in the two wires are i1=325 A and i2=5.00 A Force between the wires is F=3.20×10-3 N/m...

Q: A 30-kg child sits on the edge of a merry-go-round. The child is located 6 m from the center of the ...

A: Given data: The mass of child is m=30 kg. The distance of child from center is r=6 m. The tangentia...

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.