Star A has radius R, a temperature of T degrees Kelvin, and is at a distance...
Star A has radius R, a temperature of T degrees Kelvin, and is at a distance D from Earth. Star B has radius 2R, a temperature 3T and is at a distance 4D from Earth. Star A has an apparent brightness of P watts per square meter. What is the apparent brightness of star B as a multiple of P?
Homework Answers
Add Answer to:
Star A has radius R, a temperature of T degrees Kelvin, and is
at a distance...
An O star has a temperature of 20,000 K and a radius 10 x that of...
An O star has a temperature of 20,000 K and a radius 10 x that of the Sun. How much more luminous is the O star than the Sun? At what distance would the O star have to be placed to appear to be the same brightness as the Sun. Express your answer in AU and light-years.
3. [9 marks] You have access to a small professional telescope that is able to record...
3. [9 marks] You have access to a small professional telescope that is able to record the ultraviolet through infrared spectrum of a star in the constellation of Orion. You determine that the wavelength of light at the peak of the spectrum is 922.93 nm. The star’s apparent magnitude is m = 0.45. a) [2 marks] Determine the star’s surface temperature in units of Kelvin (K). b) [3 marks] Using the solar constant and the Sun’s apparent magnitude, determine the...
If one star has a temperature of 5100 K and another star has a temperature of...
If one star has a temperature of 5100 K and another star has a temperature of 7709 K, how much more energy per second will the hotter star radiate from each square meter of its surface?
The surface of the Sun has a temperature of 5500 ∘C. Treat the sun as a...
The surface of the Sun has a temperature of 5500 ∘C. Treat the sun as a perfect blackbody with an emissivity of 1.0 and a radius of 7.0*10^8 m. Given; the temperature of space is 3.0K and the power that it takes for the sun to radiate into space is 3.9 * 10^26 W. The solar constant is the number of watts of sunlight power falling on a square meter of the Earth's upper atmosphere. Calculate the solar constant given...
Imagine a hypothetical star of radius R, whose mass density ρ is constant throughout the star....
Imagine a hypothetical star of radius R, whose mass density ρ is constant throughout the star. The star is composed of a classical ideal gas of ionized hydrogen, so there are free protons and free electrons flying around providing the pressure support. The star is in hydrostatic equilibrium (a) What is the pressure as a function of radius in the star, P(r)? As a boundary condition, the pressure at the surface should be zero, P(R) 0 (b) What is the...
Scientists have meaured that at a distance of 1 AU from star X energy of radiation...
Scientists have meaured that at a distance of 1 AU from star X energy of radiation passing through 1 square meter is 1200 Joules per second. Scientists have taken the same equipment to the distance of 2 AU from the same star X. At that distance the energy passing through 1 square meter is equal to A. 2400 Joules per second B. same as before, 1200 Joules per second C. 300 Joules per second D. 600 Joules per second E....
Cart mr 6- A planet of mass m and radius r orbits a star at a...
Cart mr 6- A planet of mass m and radius r orbits a star at a distance R (between their centres) with an angular velocity Wort = 2 rad/s. The planet also rotates around its own axis with an angular velocity of spin = 10 rad/s. The mass of the star is M-1000m. The moment of Star -R 00 inertia of a solid sphere is I = 2 mr 2- Calculate the total angular momentum L of the planet in...
deal gases obey the equation PV - nRT where P is the pressure of he gas, volum, sthe sunbet of moles of gas, T is its temperature, and the constant R-8.314 KPa-liters mol1 kelvin (a) Find the exa...
deal gases obey the equation PV - nRT where P is the pressure of he gas, volum, sthe sunbet of moles of gas, T is its temperature, and the constant R-8.314 KPa-liters mol1 kelvin (a) Find the exact change in volume of o, gas as the pressure increases from 12.00 to 12.01 KPa, decreases from 300.0 to 299.9 degrees kelvin, and the number of moles of 0, gas changes the temperature moles. Round the final answer to three decimal places....
deal gases obey the equation PV nRT, where P is the pressure of the gas, V is its volume, n is the number of moles of gas, T is its temperature, and the constant R-8.314 KPa-liters-mol-1 kelvin-1...
deal gases obey the equation PV nRT, where P is the pressure of the gas, V is its volume, n is the number of moles of gas, T is its temperature, and the constant R-8.314 KPa-liters-mol-1 kelvin-1 (a) Find the exac t change in volume of O, gas as the pressure increases from 12.00 to 12.01 KPa, the temperature decreases from 300.0 to 299.9 degrees kelvin, and the number of moles of 0, gas changes from 1.03 to 1.01 moles....
In a certain particle accelerator, protons travel around a circular path of diameter D in an evacuated chamber, whose residual gas is at temperature T and pressure p. Assuming T is given in Kelvin an...
In a certain particle accelerator, protons travel around a circular path of diameter D in an evacuated chamber, whose residual gas is at temperature T and pressure p. Assuming T is given in Kelvin and p in pascals, calculate the number n of gas molecules per cubic meter under these conditions, what is the mean free path λ of the gas molecules if the molecular diameter is d. State your answers in terms of the given variables, using the Boltzmann...
Imagine a hypothetical star of radius R, whose mass density ρ is constant throughout the star. The star is composed of a classical ideal gas of ionized hydrogen, so there are free protons and free electrons flying around providing the pressure support. The star is in hydrostatic equilibrium (a) What is the pressure as a function of radius in the star, P(r)? As a boundary condition, the pressure at the surface should be zero, P(R) 0 (b) What is the...
Cart mr 6- A planet of mass m and radius r orbits a star at a distance R (between their centres) with an angular velocity Wort = 2 rad/s. The planet also rotates around its own axis with an angular velocity of spin = 10 rad/s. The mass of the star is M-1000m. The moment of Star -R 00 inertia of a solid sphere is I = 2 mr 2- Calculate the total angular momentum L of the planet in...
deal gases obey the equation PV - nRT where P is the pressure of he gas, volum, sthe sunbet of moles of gas, T is its temperature, and the constant R-8.314 KPa-liters mol1 kelvin (a) Find the exact change in volume of o, gas as the pressure increases from 12.00 to 12.01 KPa, decreases from 300.0 to 299.9 degrees kelvin, and the number of moles of 0, gas changes the temperature moles. Round the final answer to three decimal places....
deal gases obey the equation PV nRT, where P is the pressure of the gas, V is its volume, n is the number of moles of gas, T is its temperature, and the constant R-8.314 KPa-liters-mol-1 kelvin-1 (a) Find the exac t change in volume of O, gas as the pressure increases from 12.00 to 12.01 KPa, the temperature decreases from 300.0 to 299.9 degrees kelvin, and the number of moles of 0, gas changes from 1.03 to 1.01 moles....
In a certain particle accelerator, protons travel around a circular path of diameter D in an evacuated chamber, whose residual gas is at temperature T and pressure p. Assuming T is given in Kelvin and p in pascals, calculate the number n of gas molecules per cubic meter under these conditions, what is the mean free path λ of the gas molecules if the molecular diameter is d. State your answers in terms of the given variables, using the Boltzmann...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago