A comet moves in an elliptical orbit around a star. When it is closest to the star at a distance of 9.25 ✕ 1010 m, the comet's speed is 72.0 km/s. How far is it from the star when its speed is 63.5 km/s? Take the mass of the star to be 1.99 ✕ 1030 kg, the same as that of our Sun.

During a solar eclipse, the Moon is positioned directly between Earth and the Sun. The masses of the Sun, Earth, and the Moon are 1.99 x 1030 kg, 5.98 × 1024 kg, and 7.36 x 1022 kg, respectively. The Moon's mean distance from Earth is 3.84 × 10 m, and Earth's mean distance from the Sun is 1.50 × 10'" is G = 6.67 x 10-1' N•m²/kg². m. The gravitational constant Find the magnitude F of the net gravitational force acting on the Moon during the solar eclipse due to both Earth and the Sun. 2.6 x1045 F = N Incorrect

Comets travel around the sun in elliptical orbits with large eccentricities. If a comet has speed 3.1x10^4 m/s when at a distance of 2.7x10^11 m from the center of the sun, what is its speed when at a distance of 4.7x10^10 m? Mass of the Sun is 1.99×10^30 kg. Gravitational constant is G=6.67×10^(−11) m^3 /(kg⋅s).   What is the formula?   (Answer: 75006.70209088 m/s)

Please don't provide handwritten solution .....

The gas-giant planet Rom (mass 5.7⨯1026 kg) goes around the star Galla (mass 2.0⨯1030 kg) in a circular orbit.  If the orbital radius of Rom is 2.5×1011 m … Note: G = 6.67⨯10-11 N·m2/kg2 i) What is the gravitational force of Rom on Galla?

Aliens declare war on Earth by dropping an asteroid on our planet.  The asteroid starts at rest from a distance of 37 x 106 m from the center of Earth.  Calculate the speed with which the asteroid hits Earth's surface, in km/s.  Use that G = 6.7 x 10-11 N m2 / kg2, MEarth = 6 x 1024 kg, and REarth = 6 x 106 m. (Please answer to the fourth decimal place - i.e 14.3225)

The moon has a mass of 7.35 x 1022 kg and a radius of 1.738 x 10° m. At what speed must a rocket be launched from the surface of the moon so as not to fall back to the moon?

Find the distance of a point from the earth's center where the resultant gravitational field due to the earth and the moon is zero. The mass of the earth is 6 * 0 * 10 ^ 24 kg and that of the moon is 7*4*10^ 22 kg. The distance between the earth and the moon is 4*0*10^ 5 km.

On a planet whose radius is 1.80 × 104 km, the acceleration due to gravity is 16.5 m/s?. What is the mass of the planet?

Part A Comets travel around the sun in elliptical orbits with large eccentricities. If a comet has speed 2.1×104 m/s when at a distance of 2.6x1011 m from the center of the sun, what is its speed when at a distance of 4.0×1010 m. Express your answer in meters per second. Πνα ΑΣΦ m/s