1). A star has six times the radius of the Sun (Appendix C) and a temperature of 2000 K. Find its luminosity. Compare that to the actual luminosity of the Sun. Stars have an emissivity of 0.95.

Q: Why do sunspots look dark? Othey are holes in the photosphere through which the cooler interior of…

A:

Q: Which of the following layers of the Sun can be seen with some type of telescope? Consider all forms…

A: Required : Which of the following layers of the Sun can be seen with some type of telescope.

Q: ssing information. Use gravity, g = 10 m/s² avelength =_ (7) meter %3D Linear mass Mass (gram)…

A: V= √T/u  V=f(wavelength)

Q: Which of the following is least reasonable regarding energy production in the Sun? Group of answer…

A: The statement that is least reasonable regarding energy production in the Sun is:"Although the Sun…

Q: Assume that Hydrogen comprises 78% of the Sun’s mass. How much mass is this?

A: The original mass of the sun is,

Q: Calculate the average surface temperature of the Sun using Wien’s Law. The wavelength of maximum…

A: λ = 500nm

Q: H.w: Find Solar haur angte as th Solar time (9:00, 10:10, 12:15,15825) for May 2012 in Baghdadl.

A: Here we use   Time (t) in the decimal form use , t=ω1h15∘

Q: why is the sun hot?

A: Sun can be defined as the star at the centre of the solar system, it is also called a heavenly body…

Q: Explain why some solar shock waves are thought to die out at heliocentric distances of 3-5 R. How…

A: Explanation, Some solar shock waves are thought to die out at heliocentric distances of 3-5R⊙

Q: sun emits light having maximum intensity at a wavelength 468nm. Assume emissivity of sun is 1.…

A: Option

Q: What is the source of energy for the sun? O hydrogen fusion O nuclear fission of metals O internal…

A: In the given question we have to discuss about the source of energy for the sun.

Q: Which part of the flame is the hottest? A) Blue Zone B) Luminous Zone C) Dark Zone D) Non - Luminous…

A: Blue zone of the flame is hottest because of the complete combustion and have most amount of oxygen…

Q: Sunspots are related to the Sun's a. core rotation b. magnetic field lines tangling c.…

A: Correct option is (b) i eagnetic field lines tangling .

Q: The figure shows a very simplified version of the structure of the Sun. For each statement below…

A: The sun's structured into several layer according to the above picture the layer are disgnated as…

Q: Whether the statements that the temperature of the Sun is about 15 million °C or the temperature of…

A: One website informs us that the sun's temperature is around 15 million degrees Celsius, while…

Q: G

A:

Q: Estimate how much mass the Sun loses through fusion reactions during its 10-billion-year life. You…

A: Solution:   Converting the year into seconds: 1 year=365 days1 year24 hrs1 day60 mins1 hr60 s1…

Q: For April 10th at a location at 40° latitude, calculate: (i) the extraterrestrial normal radiation…

A:

Q: Based on what you've learn on the impact of the Earth-Sun distance on the seasons, what can you say…

A:

Q: Which composite or chemical to protect the sun visor from melting  do you prefer ?

A: In this problem, it is asking about to composite or chemical to protect the sun visor from melting.…

Q: Even if the Earth's orbit were circular, we would still have seasons. The reason is that…

A:

Q: 6.96 X 10 km) Use this result to compute the approOximate period of the Sun's rotation. (R. 13-2.…

A: Given: Potential energy of the Sun, U = (-2GM2/R) Radius, R = 6.96 × 105 km Mass, M = 1.99 × 1030 kg

Q: The magnitude of the solar constant, which has a temperature of 5800 k and an estimated radius of 7…

A:

Q: Exercise: Determine the amount of solar energy approaching Earth if its diameter is 12700km.

A:

Q: According to the Stefan-Boltzmann law, how much energy is radiated into space per unit time by each…

A: A blackbody absorbs all the radiation that falls on it and then re-emits it.   Stars can be…

Q: Solar scientists want to measure the temperature inside the sun by sending in probes. Imagine that…

A: Increase in temperature for every 10,000 km below the surface of sun = 106 oCCost of measuring x…

Q: Calculate the maximum and minimum solar elevation angles for a city (85°N, 18°E)

A: At sunrise and sunset the elevation angle is Zero (0°). The solar elevation angle is maximum in…

Q: The chart below shows several large peaks of warmer temperatures. Which Milankovitch cycle does this…

A: Milankovitch cycle does this corresponds with

Q: Compute the solar zenith angle for solar noon on June 13, 2015 in a location with latitude 73°N and…

A: The date is given as, June 13, 2015. The location is given as, Latitude=73oN and Longitude=92oW. TO…

Q: For Jeddah, Saudi Arabia (GMT + 3 hours, 21.48° N. 39 19* E) on Apri 22nd. 2021 If a solar collector…

A: Hi the correct answer is  option b     The hour angles at sunrise and sunset (ωS) are very useful…

Q: Solar Zenith Angle at Nordlysstasjonen 60 Daylight 80 100 Evening/Nighttime 120 100 200 300 Day of…

A: The Earth progresses through its seasons because its north-south axis has a 23.5-degree tilt. During…

Q: Suppose you were given a spectrum of a planet.  The spectrum has a collection of absorption lines.…

A:

Q: What is the wavelength of maximum intensity (in nm) and the total energy emitted (in J/s/m2) by a…

A: The temperature of the celestial body is given to be 7K. In case of a celestial body which we…

Q: Estimate the rate at which the Sun loses mass (kg/s) due to the solar wind. Assume the solar wind is…

A:

Q: How can you determine the radius of the ?Sun

A: A solar eclipse occurs when the Moon passes between the Sun and Earth, and when the Moon fully or…

Q: The sunspot cycle affects   I. the latitude at which sunspots are visible at a given time.   II.…

A: The sunspot cycle affects I. the latitude at which sunspots are visible at a given time. II. the…

Q: Why does it take so long for the energy produced in the Sun's core to reach the surface?

A: The main source of energy in stars like our Sun is hydrogen fusion. In this process, hydrogen is…

Q: Calculate the gravitational energy released by the Sun.

A: Gravity is the force of attraction between objects with mass. It is responsible for the formation of…

Q: In class we found an expression for the 'garden hose angle', ψ, and showed it had a typical value…

A:

Q: Assume that Hydrogen comprises 74% of the Suns' mass. How much mass is this?

A: The mass of the Sun is

Q: The Sun has a radius of 6.955×105 km and a mass of 1.989×1030  kg. What is the density of the Sun?…

A: Considering sun as a sphere, the volume of sun is

Q: Give the following figure of the sun, label the features observed and describe some of the…

A:

Q: The surface temperature of the Sun is 5,800 K.   What wavelength of light is most intense?…

A:

Q: Suppose the Sun were to shrink to 50% of its present diameter. How would the gravitational energy…

A: Gravitational force is one of the fundamental forces of nature. It is defined as the force of…

Q: why does nuclear fusion in the sun only occur near the center?

A: Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more…

Q: In a scale model of the solar system, the Sun is represented by an object that is 4.5 feet in…

A: Diameter of sun = 1.3927 ×109 m Diameter of Earth = 12742000 m In a scale model, diameter of sun =…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.