A newly discovered bright star has a luminosity of 78.4×1026 W. What is its temperature if it has a radius of ~1.2x106 km?

Q: Fill in the blanks: Using your calculator solve for the following problems and write your answer in ...

A: Given: 

Q: Replace the 30-kN force acting at point A by a force-couple system at (a) point O and (b) point B. A...

A: Given, Force acting on point A, F = 30 kN

Q: Point charges of +12 x 10-9 C and -12 x 10-9 C are placed 10cm apart. (a) Compute the potential at p...

A:

Q: a force F on the free end of the cord. (a) What must be the magnitude of F if you are to lift the ca...

A:

Q: Light of wavelength 594 nm in vacuum passes through a piece of fused quartz of index of refraction n...

A: Given that:- Refractive index of fused quartz=1.458

Q: 70 NOTLO DOOT UPL 14V 13 = 0.97A NLING. a A NOT 100 76

A:

Q: A 163-turn circular coil of radius 3.03 cm and negligible resistance is immersed in a uniform magnet...

A: According to Faraday's law of electromagnetic induction, rate of change of flux linkages is equal to...

Q: Calculate the width the interference fringe in the middle of the screen between two slits given the ...

A: Given  Wavelength λ = 697 nm = 697 ×10-9 m   Distance between slits d = 0.014 mm = 0.014 × 10-3 m  D...

Q: 800 ideal capacitors are connected in parallel to an ideal voltage source, forming an ideal circuit....

A: Solution Given, Total No. of capacitor = 800 Capacitance of first capacitor = 3.52 μF According to q...

Q: A point charge of 12 pC experiences an intensity of 6 x10^-3 N/C. How far is the point charge from t...

A:

Q: The position of a mass oscillating on a spring is given by the equation (5. I cm) cos (75t). What is...

A: Given  x=5.1 cos2π0.75st

Q: A car is moving on a straight road at 10 m/s .it is accelerated at 14 m/s?. What will be it's veloci...

A: Initial velocity of car , u = 10 m/s. Acceleration of car, a = 14 m/s^2 Time at which velocity is to...

Q: 2. When a 12.0V car battery runs a single 30J headlight, How many electrons pass through it each sec...

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Q: Part A 12 10 3 11.76 4 15.61 8 18.6 6. 22.02 26.23 4 8. 30.92 35.46 10 42.7 10 15 20 25 30 35 40 45 ...

A:

Q: As a bat flies toward a wall at a speed of 5.00 m/sm/s , the bat emits an ultrasonic sound wave with...

A:

Q: Tarik winds a small paper tube uniformly with 191 turns of thin wire to form a solenoid. The tube's ...

A:

Q: A point charge of 12 pC experiences an intensity of 6 x10^-3 N/C. How far is the point charge from t...

A: Given, Charge, q= 12 pC Electric field intensity, E = 6×10-3 NC

Q: TV channel 2 broadcasts in the frequency range 50 to 59 MHz. What is the corresponding range of wave...

A:

Q: You pull on a string with a horizontal force of magnitude Fyh = 56 N that is attached to a block of ...

A: A) Energy due to friction = ((m_b*g*cos*(θ)-Fsin(θ))*u*d                                          = ...

Q: A progressive wave y (x, t) = 0.2 sin (30t – 4.0 x) where x is in in cm and t is in s. Calculate: (a...

A:

Q: A point charge of 12 pC experiences an intensity of 6 x10^-3 N/C. How far is the point charge from t...

A:

Q: A ray of light travels from air into another medium, making an angle of 8, - 45.0* with the normal a...

A: Given: Light ray travelling from air to another medium. Let air be the medium 1. Refractive index of...

Q: Find the focal length of a lens that produces an inverted image five times the size of a small objec...

A: The equation governing the image and object distances and the focal length are 1f=1v-1u, where f = f...

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Q: Electric Energy and Potential 2. The electric field of a dipole is drawn below showing both the surr...

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Q: Please help thank you a) Find the maximum velocity of the eardrum for vibrations of amplitude 3 99 x...

A: Given: The amplitude of the eardrum is 3.99x10-8 m. The frequency is 20 kHz.

Q: In the circuit shown below emf = 80.0 V, R5 = 4.00 Ω, R3 = 2.00 Ω, R2 = 2.20 Ω, I5 = 9.20 A, I4 = 5....

A:

Q: You push your physics book 1.50 m along a horizontal tabletop with a horizontal push of 2.40 N while...

A:

Q: A small rowboat has a mass of 59.3 kg. When a 78.5-kg person gets into the boat, the boat floats 8.0...

A: mass of boat = 59.3 kg mass of person = 78.5 kg displacement of boat as person gets into boat = 8 cm...

Q: How large is the electric charge of an object with 200 000 000 000 000 000 000 ( 200 sextillion) ele...

A: Given data:  Number of electrons (n) = 2×1020 Required: Charge (q) 

Q: Please help. Thank you Required info: Each prong of a vibrating tuning fork moves back and forth qui...

A: Given: The distance between the two extremes' positions is 2.3 m. The frequency of the wave is 3570 ...

Q: Two steel plates are fastened together using four bolts. The bolts each have a shear modulus of 80.0...

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Q: 2. Tritium, (3 H) is used in glowing "EXIT" signs located where there is no electricity for light bu...

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Q: car drives south at 20 mi/hr. Another car, starting from the same point at the same time and traveli...

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Q: what average braking force is necessary to stop a 2,500 kg car travelling with an initial velocity o...

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Q: Problem 5: The wavelength range of visible light is usually taken to be from 400 to 700 nm, althou...

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Q: For the truss shown, determine thestress in members AC and BD. The cross sectional area of each memb...

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Q: the magnetic field is 1.0 x 105 T. 3. Two parallel wire carrying current of 20.0 A are separated by ...

A:

Q: What direction does the magnetic force point? +q X A) +x direction D) -x direction B) +y direction E...

A:

Q: Given data: work done%-D500 J Force%3D25 N Find displacement

A: Given data : Force=F Work done=W To find : Displacement

Q: Refer to the given circuit. C1 = 5 µF C3 = 8 µF C2 = 4 µF C4 = 6 µF C5 = 4 µF DURACELL VT = 12 V Det...

A:

Q: Two charges atfract each ofher with a dectrestatic force F=4x10"N when they are 4mm apart. Find the ...

A: The electrostatic force between two charges is given by F = kq1q2r2, where k = Coulomb's constant q1...

Q: 2. Calculate the equivalent resistance in the following circuit and also find the current I, 1 and 1...

A:

Q: What is the electric flux if an enclosed charge is made up of 1 billion electrons? O 18.80 Nm^2/C 81...

A: Given:n=1 billion electrons=1*109 electrons

Q: A chunk of ice at − 20 degrees C is added to a thermally insulated container of very cold water at 0...

A: Option (D) is the correct answer. Some of water freezes and the chunk of ice gets larger.

Q: A man on a bicycle rounds a flat curve of 100-m radius at a speed of 60kph. Determine the angle (in ...

A: Velocity of cyclist  during bending of road V^2 = rg × tan(theta) Theta is the angle with respect to...

Q: fireworks mortar is launched straight upward from a pool deck 2 m off the ground at an initial veloc...

A: GivenInitial height of pool deck , h0=2 minitial velocity of firework motor, u=40 m/s

Q: A7 Ohm resistor and a 35 Ohm resistor are connected in series to a 12 Volt battery. What current flo...

A: Since the resistor are in series the net resistance is given by  Rnet = R1 + R ² Rnet =  7 + 35 = 42...

Q: A 1.20 kg drone is being used to make video for use in University promotional materials. It is flyin...

A: Given that:- Mass of drone=m=1.2kg

Q: 4. A defibrillator is used during a heart attack to restore the heart to its normal beating pattern....

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.