A star has a life expectancy of 5 billion years. What would be its mass?
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A: Given- Mass M=n×1.5Ms n=number of stars in the milky Way galaxy Ms=Mass of the sun
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A: Given , Temperature = 3000 K Solar Luminosity = 100,000 Now , mass and luminosity are related by…
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Q: If the speed of light is given as 299,792,458 meters per second and the wavelength is 375 nm. what…
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Q: 6.2 The half-life of helium-6 is 806.7 ms. If helium-6 is placed in a particle accelerator and is…
A: Given:To = 806.7 ms = 806.7 x 10-3 sv = 99.855% of c = (0.99855)c Half life measured:We know that…
Q: The H-alpha line from a star is observed to be 725 nm. Estimate its redshift.
A: As per De Broglie's hypothesis light can behave both as a wave and particle. Thus light waves can…
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Q: What is the average density of a neutron star that has the same mass as the sun but a radius of only…
A: Given, mass of sun = mass of neutron star = 1.989 ×1030 kg radius = 84.66 km
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Q: The Sun’s lifetime is about 10 billion years. Estimate the lifetime of a star with twice the mass of…
A: Given data as per question Lifetime of sun =10 billion years
Q: A star is observed to have a parallax of 0.05". If we were to send a radio signal towards this star…
A: The parallax angle of a star is observed to be θ=0.05''=0.05 arcseconds. Let the distance to the…
Q: How much energy is produced when the sun converts 6 kg of mass into energy?
A: Given Data: The mass is, m=6 kg The expression for the mass-energy equivalence or the theory of…
Q: A radio transmitter broadcasts at a frequency of 119kHz. What is the wavelength of the wave? ( speed…
A: Given, The frequency of the broadcast signal is, f = 119 kHz = 119×103 Hz speed of the light in the…
Q: What is the average density of the neutron star that has the same mass as the sun but a radius of…
A: Density is defined as mass per unit volume. Consider the neutron star is spherical in shape having…
Q: What is the average density of a neutron star that has the same mass as the sun but has a radius of…
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Q: Find the approximate mass of the dark and luminous matter in the Milky Way galaxy. Assume the…
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Q: If a space ship traveling at 1/5 the speed of light travels to a star system 6 light years away How…
A: Speed of spacecraft is ; here is speed of light.Distance is Note:Speed of light is Find:Time taken…
Q: One light year is the distance traveled by light in a year. Convert one light year to meter using…
A: speed of light (v) = 3 ×108 mstime (t) = 1 year
Q: A radio transmitter broadcasts at a frequency of 143kHz. What is the wavelength of the wave? ( speed…
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Q: Exercise: One parsec is a unit of distance equal to roughly 3.25 light-years. The prefix Mega means…
A: For this problem, it is required to convert the distance 24 Mpc into kilometers. It is given that, 1…
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A: The density of a neutron star is given by, ρ=MV where M is the mass of the star and V is the volume…
Q: A star is 80 light years from Earth. How fast does a spacecraft have to be for the journey to last…
A: The objective of the question is to find out the speed of a spacecraft that would allow an astronaut…
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A: Assuming the abundance of different element per unit mass is X, Y and Z for hydrogen, helium and all…
Q: timate the temperature of the planet (in K), if it is in thermal equilibrium with the star it…
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Q: Find the wavelength of peak intensity for a hot 45000 K star that emits thermal radiation.
A: Given information:Temperature of the object (T) = 45000 K
Q: radio transmitter broadcasts at a frequency of 139kHz. What is the wavelength of the wave? ( speed…
A: Frequency = 139 kHz = 139000 Hz Speed of light = 3 × 108 m/s
Q: The temperature of the universe is 2.76 K. What is the wavelength of the cosmic background…
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Q: What is the distance in light years (ly) to Alkaid? 12 ly 104 ly 55 ly 4 ly
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Q: Calculate the length of one light-year (ca), in metres.
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Q: If a star has a surface temperature of 20,000 K (2.00 × 104 K), at what wavelength will it radiate…
A: For calculating the wavelength emitted by a hot body consider it as a blackbody. A blackbody is an…
Q: Calculate the number of miles in a light-year, using 1.86 105 mi/s as the speed of light. (Hint:…
A: Given data: The speed of light c = 1.86 × 105 miles/s No. of days in a year = 365 days
Q: A star has a surface area of 6.92*1018 m2 . How much power does it radiate if it has a surface…
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Q: What is the average density of a neutron star that has the same mass of the sun (1.9891 × 1030 kg)…
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Q: What is the average density of a neutron star that has the same mass as the sun but a radius of only…
A: Given that: Radius of neutron star r=82.794 km Mass of neutron star is equal to mass of Sun.
Q: A star collapses onto a neutron star. If its original radius is 7x105 km, by what factor will its…
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Q: Doppler redshift in light from a star indicates that the star is_____.
A: When there is relative motion between observer and source then there is change in frequency ( or…
Q: A main sequence star of mass 25 M⊙has a luminosity of approximately 80,000 L⊙. a. At what rate DOES…
A: Given information: The mass of the star (m) = 25M⊙ The luminosity of the star (L) = 80000L⊙ part a):…
Q: A star is 80 light years from Earth. How fast does a spacecraft have to be for the journey to last…
A: The objective of this question is to find out the speed of a spacecraft that would allow an…
Q: For A= 2î + 4ĵ - 2k, B = -4î + ĵ + 2k, and C = 2j - 3k, find C (A - B). %3D
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Q: A radio transmitter broadcasts at a frequency of 142kHz. What is the wavelength of the wave?
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Q: A black body radiates energy at the rate of 1×105J/s×m2 at temperature of 227∘C.The temperature to…
A: A black body radiates energy at the rate of 1×105 J/s×m2 at a temperature of2270C,So,The temperature…
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