Physics, 26.11.2019 06:31 alyssabond5219
The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. it is a good approximation to assume that the emissivity e is equal to 1 for these surfaces. part a find the radius rrigel of the star rigel, the bright blue star in the constellation orion that radiates energy at a rate of 2.7Γ1031w and has a surface temperature of 11,000 k. assume that the star is spherical. use Ο=5.67Γ10β8w/m2β k4 for the stefan-boltzmann constant and express your answer numerically in meters to two significant figures. rrigel = 5.1Γ1010 m submithintsmy answersgive upreview part correct this is over 50 times the size of our own sun and about a third of the orbital radius of the earth around the sun. rigel is an example of a supergiant star. part b find the radius rprocyonb of the star procyon b, which radiates energy at a rate of 2.1Γ1023w and has a surface temperature of 10,000 k. assume that the star is spherical. use Ο=5.67Γ10β8w/m2β k4 for the stefan-boltzmann constant and express your answer numerically in meters to two significant figures. rprocyonb = 1.61β’1011 m
Answers: 1
Physics, 21.06.2019 15:30
A1kg cart slams into a stationary 1kg cart at 2 m/s. the carts stick together and move forward at a speed of 1 m/sl. determine whether kinetic energy was conserved in the collision. use the law of conservation of energy to explain the collision
Answers: 3
Physics, 21.06.2019 20:20
Suppose that a comet that was seen in 563 a.d. by chinese astronomers was spotted again in year 1951. assume the time between observations is the period of the comet and take its eccentricity as 0.986. what are (a) the semimajor axis of the comet's orbit and (b) its greatest distance from the sun?
Answers: 1
Physics, 21.06.2019 23:30
The velocity of car is 80.0 miles per hour. what is the velocity of car in meters per second? (1 km -0.621 miles) m/s
Answers: 2
The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. it is a good...
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