A star collapses onto a neutron star. If its original radius is 7x105 km, by what factor will its spin rate increase

Q: 2. A Disney Cruise-ship decides to test its new sea monster attack mechanism by an angle of 60…

A: Given: Initial velocity, v=150 m/s Angle of projection, θ=60° Distance between the water craft and…

Q: 4.3. What is the classroom DF if the lighting equals 200 lux near its internal wall and 20 000 lux…

A: Solution: Given that  External Illuminance = 20000 lux Internal Illuminance = 200 lux We have to…

Q: Which action would require no work to be done on an object? O pushing the object along a horizontal…

A: Required: The action in which no work to be done on an object

Q: A 1.9-kg object rests on a horizontal frictionless surface. It is in a position such that it is…

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Q: A 28 kg child goes down a straight slide inclined 35° above horizontal. The coefficient of kinetic…

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Q: A cart m1 with mass of 500 g rests on an inclined plane that makes an angle θ = 15° with the…

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Q: 1 Use the formula to calculate the speed in VRMP= 8(Prtiod) -x60 1/8 because the bottom plate of the…

A: Given: VRMP= 18Period×60 To Find: speed increases or decreases with frequency

Q: A mass of m = 10 kg starts on a frictionless plane. The mass starts at rest, pressed against a…

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Q: • How fast are the waves traveling? • What is the amplitude of each wave? • If the total vertical…

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Q: On one side of a converging lens of focal length 40.8 cm, you position an object of height 4.01 cm…

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Q: Young's modulus for compression of human bone is approximately 9x10⁹ N/m^2. Assume that a femur has…

A: Given in question :  Young's modulus (Y) = 9 x 109 N/m2  Stress (S) = 7.5 x 107 N/m2  Length of the…

Q: Three pieces of a string, each with length L, are joined together end to end, to make a combined…

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Q: In the figure below, m₁ = 11.2 kg and m₂ = 4.1 kg. The coefficient of static friction between m₁ and…

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Q: A grocery cart is pulled along a rough horizontal surface of 6.0 N. It moves through a distance of…

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Q: You will be given a mystery sample of mass. Return to your Atwood Machine. Put M = 500g on each side…

A: The mystery mass m can be found after knowing the acceleration a of the Atwood machine. Since there…

Q: The figure below shows three point charges that lie along the x-axis. Determine the magnitude of the…

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Q: Nitrogen gas under an initial pressure of 5.0×106 Pa at 15 °C is contained in a cylinder of volume…

A: Given : Initial pressure = P1 = 5×106 pa Volume of cylinder = V1 = 0.04 m3  Initial temperature = T1…

Q: Four joules of work is required to stretch a spring 0.5 meter from its natural length. Find the work…

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Q: copper bar of thermal conductivity 401 W/(m·K) has one end at 122°C and the other end at 24°C. The…

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Q: A metal cylinder with a mass of 1.10 kg is attached to a spring and is able to oscillate…

A: The given values in this case are: mass (m) = 1.10 kg Amplitude (A) = 0.2 m Force (F) = 18 N The…

Q: A conical pendulum consists of a mass, m, at the end of a length of an ideal rope of length l that…

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Q: the sun, which has a rotational period of 25 days, collapses from its current radius (700,000 km) to…

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Q: At a soft drink bottling plant, a horizontal section of pipe carrying citric acid in liquid form…

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Q: A wheel (radius = 0.30 m) is mounted on a frictionless, horizontal axis. A light cord wrapped around…

A: The tension T acts upwards on the object and downwards on the wheel. The equations of motion for…

Q: A capacitor has a peak current of 330 μA when the peak voltage at 330 kHz is 2.8 V. ▼ Part A What is…

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Q: A cart m1 with mass of 500 g rests on an inclined plane that makes an angle θ = 15° with the…

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Q: Table 4.1: List of 2D kinematic equations for constant acceleration, with definitions of the…

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Q: 3. How much energy, in joules, does it take to raise a gallon of room temperature water, ~21.1°C, to…

A: Given,  Initial temperature of water = 21.1°C We need to calculate,  Energy required to boil a…

Q: can i have the FBD for this?

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Q: What is the pressure at the bottom of the tank when it is filled with water as shown, in kPa…

A: The depth of the watrer is h = 3-2 m = 1 m   The net pressure on it will be the atmospheric pressure…

Q: Consider an interplanetary express bus traveling at 0.98 cc. According to Newtonian mechanics, the…

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Q: A wheel (radius= 0.30 m) is mounted on a frictionless, horizontal axis. A light cord wrapped around…

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Q: A 5.00-kg object is moved from a height of 3.00 m above a floor to a height of 7.00 m above the…

A: Given data:  Mass (m) = 5.00 kg Initial height (hi) = 3.00 m Final height (hf ) = 7.00 m Required:…

Q: This Olympic skeleton athlete slides down an icy track head first. The track has many twists and…

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Q: Consider the following figure. 4.00 Ω a 7.00 Ω www R = (a) Find the equivalent resistance between…

A: Given data: The given diagram is shown below, R1=4.00 ΩR2=7.00 ΩR3=13.0 ΩR4=9.00 Ω

Q: A block of mass m = 5.5 kg is pulled up a 0 = 24° incline as in the figure below with a force of…

A: Given, Mass of block (m) = 5.5 kg  Angle of incline (θ) = 24°  Pulling force ( F) =33 N

Q: Please refer to part (a) of Figure 1 included. Here, alpha (the angle at the top of the triangular…

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Q: The wave function for a standing wave on a string is described by y(x, t) = 0.018 sin(4x) cos(71лt),…

A: Given, The wave function for standing waves is described by y(x,t) = 0.018sin4πxcos71πt, where y and…

Q: What could you do to stop the rotation of a levitating disk once in its motion?

A: A rotating Levitating disk will have a constant angular momentum : And as the Angular momentum is…

Q: s vertically straight up.   ∙∙ The firework explodes into three pieces of equal mass 3.0 kg. The…

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Q: For this configuration, calculate the gravitational force exerted by the Sun on Uranus. You may find…

A: The gravitational force exerted by sun on uranus can be determined by  F = GMsMu/d² Here G is a…

Q: A jet plane at take-off can produce sound of intensity 9.10 W/m² at 30.1 m away. But you prefer the…

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Q: 2. Light of frequency 7.40 × 10¹4 Hz ejects electrons from surface (A) with a maximum kinetic energy…

A: Given, The frequency of the light, f=7.40×1014 Hz The kinetic energy of electrons ejected by surface…

Q: An object 2.50 cm tall is placed 20.0 cm from a converging lens. A real image is formed 9.00 cm from…

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Q: A steel cable with a total length  28 m  and mass  150 kg  is connected to two poles. The tension…

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Q: Calculate the density of (111) Planes for Sc. Fcc and BCC

A: the planar density is defined as the number of atom per unit area on the plane. let the lattice…

Q: Three polarizing plates whose planes are parallel are centered on a common axis. The directions of…

A: Write the given values below. Ii=13 unitsθ1=15°θ2=45°θ3=57°

Q: White light is spread out into its spectral components by a diffraction grating. If the grating has…

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Q: A student wakes up late on a cool spring morning and realizes they are late for Physics class. They…

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Q: Identify an everyday application of ultraviolet waves.

A: Ultraviolet Rays the Electromagnetic waves with wavelength range of 100nm to 400nm.

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.