If you build a telescope with a focal length of 2.4 m, what eyepiece focal length (in m) is needed for a magnification of 100 times?

Q: Consider a concave spherical mirror whose radius is 80 cm. Determine the position and height of the…

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Q: A Ferris wheel is 27 meters in diameter and completes 1 full revolution in 12 minutes. revolves…

A: Diameter, d = 27 m Radius, r = d/2 = 13.5 m One revolution in 12 minutes.  Distance of ferris wheel…

Q: When a 60-watt light bulb is connected to a 120-volt source the current in the light bulb is…

A: Given data:  Power (P) = 60 W Voltage (V) = 120 V Required: The current (I)

Q: R₁ -30 5Ω M 4 R3 1. What is the value of V₁? a. 6 V b. 8 V c. 9V 2. What is the value of IT? a. 0.2…

A: Hi, as this problem contains multiple sub-parts, hence the first three sub-parts will be solved for…

Q: A light bulb filament has a rms current of 0.880 A flowing through it. The voltage in the bulb…

A: Given rms current is irms=0.880 A Voltage in the bulb is V=(300 V)sin345 Hzt   We have to find the…

Q: A 300-kg boat is sailing 17.0° north of east at a speed of 1.60 m/s. 35.0 s later, it is sailing…

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Q: A current of 0.2 A is drawn by the filament of an electric bulb for 30 minutes. Find the amount of…

A: Given : Current (I) = 0.2 A Time (t) = 30 minutes = (30)(60) = 1800 seconds

Q: All I need is the letter of the correct answer. 27) When a constant unbalanced force acts on an…

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Q: All I need is the correct letter of the answer 10. The resultant of two forces, 28 N and 6 N, is 34…

A: Dear student,  Since all questions are different as per guidelines we can author only first one…

Q: When dropped a ball rebounds to 4/5 of its original height. How high will the ball rebound after the…

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Q: For a cylindrical conductor with a hollow center, let the radius from the axis to the inner circle…

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Q: A ship whose velocity relative to the water is 20 km/h is moving in a river where the water flows at…

A: Given : v1 = 20 km/h v2 = 6 km/h

Q: Discuss why it is relatively easy to change the amplitude of an AC voltage to a higher or lower…

A: Given that- it is relatively easy to change the amplitude of an AC voltage to a higher or lower…

Q: How do you estimate the performance of a refrigerator? a) By a coefficient of performance that can…

A: Performance of refrigerator

Q: What type of technology produces the image shown in the back of the room? Hint: The image is…

A: Due to this properties of  adiabatic compression and decompression of acoustic wave energy get…

Q: Q2: Find the acceleration of the three weights shown in fig. Assume pulleys are frictionless. Also…

A: Free body diagram gives whole idea of the forces acting. Force brings about motion and changes in…

Q: 1. Air temperature in the Sahara Desert has been known to reach 56.0 °C (about 134 °F). You are…

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Q: The work done in a constant pressure process is given by

A: Required : The work done in constant pressure process.

Q: A skateboarder weighing 70.28 kg goes over a smooth circular hill. If the skateboarder's speed at…

A: The situation of a skateboarder is shown below.

Q: A golf ball of mass 4.50x10^-2 kg is struck by a club. Contact lasts 2.00x10^-4 s, and the ball…

A: Given, m = 4.50 x 10-2 kg t = 2.00 x 10-4 s vf = 50.0 m/s   From Impulse-momentum theorem, Ft = Δp F…

Q: 5.00 Ω . 25.0 V 10.0 Ω ΜΗ 10.0 Ω Μ ww 5.00 Ω - 20.0 Ω

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Q: 5. In an electric circuit containing inductors, the largest induced voltage usually occurs is opened…

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Q: 7A car increases its speed from 40kph to 55 kph within 5 seconds while a bicycle increases its speed…

A: We need to comment on the answers to the given questions based on  force, acceleration and velocity.…

Q: Identify a case where an object is moving over a surface with friction, but the frictional force…

A: When the object moves in a pure rolling motion, the work done by the friction will be zero.

Q: Consider a diverging lens with an object in front of the lens. Prove that the image is always…

A: To Determine: Prove that if we consider a diverging lens with an object in front of the lens, the…

Q: What is invariant (or rest) mass? Is my definition correct? The rest mass is the mass of a particle…

A: The invariant mass is also known as the rest mass, proper mass, or intrinsic mass.

Q: Calculate the magnetic field strength of a toroid with n turns.

A: Magnetic field of a toroid with n turns can be derived using ampere's circuital law.

Q: A particle moves in the xy plane, starting from the origin at t = 0 with an initial velocity having…

A: 1) The total velocity vector at t =2s Vx(t) = Vx(initial ) +axt Vx(t) = 10+3(2)  Vy(t) = -5  V2 =…

Q: the two waves by using the principle of superposition. O O 2. Interference pattern created by the…

A: Please see answer below.

Q: The Jamaican bobsled team hit the brakes on their sled so that it decelerates at a uniform rate of…

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Q: Show work for credit. A 1.2 m wave travels 11.2 m to a wall and back again in 4 s. What is the…

A: Determine the speed of the wave.

Q: Why is the Diesel cycle more efficient (in thermodynamic terms) than the Otto cycle? a) Because the…

A: Diesel engines have more efficient than the otto cycle .

Q: a force F1=315N acts in the first quadrant at an angle of 70 degress above the x axis, while a…

A: a force F1=315N acts in the first quadrant at an angle of 70 degress above the x axis, while a…

Q: How come the Z-34 plant has 3 times more gravity than the earth when it is smaller than earth

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Q: (a) A 1.00 kg book is held stationary in the hand. Find the forces acting on the book and the…

A: This question is based on the Laws of Motion topic. We need to draw free body diagrams and write…

Q: Consider the circuit shown below, with a battery of emf E = 20. V, and resistors R1 = 2.0 Ω, R2 =…

A: Solution:-

Q: All I need is the letter of correct answer. An airplane must have a velocity of 50 m/s in order to…

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Q: What is the diameter of a 1.00-m length of tungsten wire whose resistance is 0.12 Ω

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Q: An object of mass m has these three forces acting on it (there is no normal torce, "no surface").…

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Q: A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the…

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Q: Blue exerts a constant 1333 N on white who is 200 lbs for 5 s. SHOW ALL WORK Find the changes in…

A: Given: The force exerted by blue on white is 1333 N. The mass of the white is 200 lbs. The time…

Q: list the possible errors that could effect on velocity profile in wind tunnel?

A: The possibilities could be 1)The flow is not fully developed in the sections where you measured the…

Q: Find the kinetic energy of a 26.81-kilogram object moving at 12 meters per second and located 5.63…

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Q: 28. The thermodynamic processes in the figure are* P4 PA P C OA-Isochoric, B- Isobaric, C-…

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Q: A 4-kg block is placed at point 1 on the track that is 3.5 m above the ground. Paths 1-2 and 3-4 are…

A: Write the given values with the suitable variables. m=4 kgh1=3.5 md=2 mμ=0.25 Here, m, h1, d, and μ…

Q: In a projectile motion, the time for the object to reach the maximum height is 5 seconds. What is…

A: The time of the object to reach the maximum height of the projectile motion is given as t=5 s

Q: A 24-tum circular coil of wire has diameter 1.09 m. It is placed with its axis along the direction…

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Q: A bike rider accelerates uniformly at 2.0 m/s2 for 10.0 s. If the rider starts from rest, calculate…

A: If particle is moving with constant acceleration in a straight line then distance travelled by the…

Q: Work and Energy 6. An arrow with a mass of 78g is fired from a bow whose string exerts an average…

A: Given data: The mass of the arrow is m=78 g. The force exerted on arrow is F=142 N. The distance…

Q: A white beam is incident onto a 50° prism made of flint glass. The index of refraction of yellow…

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.