
A distant galaxy, far, far away, contains approximately 4.58x1011 stars with an average mass of 2.25x1030...
Our galaxy, the Milky Way, contains approximately 4.0 x 1011 stars with an average mass of 2.0 x 1030 kg each. How far away is the Milky Wayfrom our nearest neighbor, the Andromeda Galaxy, if the Andromeda contains roughtly the same number of stars and attracts the Milky Way with a gravitational forceof 2.4 x 1030 ?
A large asteroid of mass 60900kg is at rest far away from any planets or stars. a smaller asteroid of mass 8.0 x 10^2 kg, is in circular orbit about the first at a distance of 366 meters as a result of their mutual gravitational attraction. What is the speed of the second asteroid? Now suppose that the first and second asteroids carry charges of +2.68c and -2.68c. How fast would the second asteroid have to be moving in order...
Two stars of equal mass form a binary system. If the two stars have an average separation of 7.38 x 108 km, and the magnitude of the gravitational force is 2.23×1027 N between the stars, find the mass of each star in kg. Express your result in scientific notation and to three significant digits. Be careful with units!
Two stars of equal mass form a binary system. If the two stars have an average separation of 7.38 x 108 km, and the magnitude of the gravitational force is 3.03×1027 N between the stars, find the mass of each star in kg. Express your result in scientific notation and to three significant digits. Be careful with units! (Please help! Correct answers will receive thumbs up)
A large asteroid of mass 71700 kg71700 kg is at rest far away from any planets or stars. A much smaller asteroid, of mass 830 kg,830 kg, is in a circular orbit about the large asteroid at a distance of 256 m256 m as a result of their mutual gravitational attraction. What is the speed ?2v2 of the second asteroid? ?2 m/sm/s Now suppose that the first and second asteroids carry charges of +1.68 C+1.68 C and −1.68 C,−1.68 C,...
Two masses are in space far away from any star or planet. Mass 1 is 6 x 103 kg and mass 2 is 30 kg. The magnitude of the gravitational force between is .9 Newtons. If mass 2 is orbiting in a circular orbit around mass 1, what is its period of orbit in seconds? Assume mass 1 is not moving at all.
Two masses are in space far away from any star or planet. Mass 1 is 3 x 105 kg and mass 2 is 14 kg. The magnitude of the gravitational force between is 1.6 Newtons. If mass 2 is orbiting in a circular orbit around mass 1, what is its period of orbit in seconds? Assume mass 1 is not moving at all.
Two masses are in space far away from any star or planet. Mass 1 is 2 times 10^5 kg and mass 2 is 13 kg. The magnitude of the gravitational force between is 1.2 Newtons. If mass 2 is orbiting in a circular orbit around mass 1, what is its period of orbit in seconds? Assume mass 1 is not moving at all.
Assume a typical galaxy in the Coma cluster moves at a speed approximately equal to the cluster’s velocity dispersion, 977 km s−1 , and the diameter of the Coma cluster is 6 Mpc. a) [5 pts] Estimate how long a galaxy in the Coma cluster would take to travel from one side to the other. b) [2 pts] How does this compare to the present-day Hubble time, tH? c) [3 pts] If there are 1000 galaxies in the Coma cluster,...
1/ Sirius A has a luminosity of 9.98 x 10^27 W and a surface temperature of about 9400K. What is its radius? A/ r = 7.56 x 10^8 m B/ r = 1.34 x 10^9 m C/ r= 1.26 x 10^13 m D/ r = 7.94 x 10^-14 m 3/ which of the following stellar properties is the most fundamental to a star’s main-sequence and post-main sequence life? A/ temperature B/ mass C/ luminosity D/ radius 4/ Stars Moppit and...