The sun's mass is roughly 333,000 times that of the Earth. A white dwarf with the...
Consider a white dwarf with the same mass as our sun. What would its radius need to be (in Earth radii) to have an escape speed of 7000 kilometers per second?
Consider a white dwarf with the same mass as our sun. What would its radius need to be in Earth radii) to have an escape speed of 7000 kilometers per second?
1. Earth travels around the Sun at a speed of 29.8 kilometers per second. At this speed, Earth requires 3.15576×107 seconds to orbit the Sun once. What is the distance from the Earth to the Sun in kilometers? 2. The moon, at an average distance from the Earth of 384,403 km takes 27.32166 days to orbit the Earth. What is the velocity of the moon in kilometers per hour?
Suppose our Sun eventually collapses into a white dwarf, losing about half its mass in the process, and winding up with a radius 1.0% of its existing radius. Assuming the lost mass carries away no angular momentum, what would the Sun's new rotation rate be? (Take the Sun's current period to be about 30 days.) What would be its final KE in terms of its initial KE of today?
3.(a) Using for kinetic and gravitational energies of the white dwarf star simplified ex pressions 2 NVI star 2me where me is the mass of the electron and V (4n/3) R3 is the star volume. Find the star radius Rmin at which the total energy Εκ + EC is minimal. (b) Sirius B is the second white dwarf discovered, with the mass close to that of the Sun Mun ะ 2 * 1030kg. Evaluate the number of protons N (assuming...
An asteroid, whose mass is 2.50×10-4 times the mass of Earth, revolves in a circular orbit around the Sun at a distance that is 2 times the Earth's distance from the Sun. Calculate the period of revolution of the asteroid. Tries 0/10 What is the ratio of the kinetic energy of the asteroid to the kinetic energy of Earth?
1.) The earth completes a circular orbit around the sun with a radius of 93,000,000 miles. What is the speed of the earth around the sun in meters per second? Assume that one year has 365.25 days. Figure out the number of seconds in one year. Put results in scientific notation.
Jupiter has a mass that is 320 times that of Earth and a radius that is 11.2 times that of Earth. What is the escape velocity from Jupiter in kilometers per second?
Saturn has a mass that is 95 times that of Earth and a radius that is 9 times that of Earth. What is the first cosmic velocity for Saturn in kilometers per second?
Satellite A has twice the mass of satellite B, and circles in the same orbit. Compare the two satellite's speeds. The speed of B is twice the speed of A. The speed of Bis half the speed of A. A. The speed of Bis one-fourth the speed of A. The speed of B is equal to the speed of A. The speed of Halley's Comet, while traveling in its elliptical orbit around the Sun, O is constant increases as it...