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I measured the angular separation of Jupiter's moons in arcminutes/arcseconds and converted this angle to radians. The conversion factor for degrees to radians was 57.3 degrees per radian.
Which unit of measurement is larger? 1 degree or 1 radian?
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- You have walked around the rim of a large circle whose radius is 2.1 miles. The GPS tells you that you have walked a path length of 8 miles. What angular distance (in radians) have you walked?If the Earth be at one half of its present distance from the Sun , how many days will be there in a year?the weight, w, of an object varies inversely as the square of the distance, d, between the object and the center of Earth. If a man weighs 75kg on the surface of Earth, how much would he weigh 300km above the Earth's surface? (given the radius of the earth is approximately 6400km)
- At some point during their orbit, the location of the earth and moon relative to the sun will be as shown in the figure below. What are the magnitude in N, and direction of the forece experienced by the Moon, in degrees below the Sun-Moonline due to the Sun and the earth? (The mass of the Moon is 7.35x1022 kg, the Earth has a mass 5.97x1024, and the Sun has a mass of 2.00x1030. In the figure, the distance from the Moon to the earth is 3.84x108m and the distance from the Moon to the Sun is 1.50 x 1011mAn astronaut is landing on the Moon. What will be the angular diameter of the Earth that he will observe? (a) .52 deg(b) 1.1 deg(c) 1.91 deg(d) 0.955 deg(e) none of the above Solution: Distance D = 384000 kmEarth radius REarth = 6400 kmMoon’s radius RMoon = 1737 kmHow long does it take light to travel three times around the circumference of Earth? The radius of Earth is 6371.0 km and the speed of light is 2.998×105 km s−1.
- What is the approximate percentage difference in diameter from Earth to Mars? a. 0.87% b. 1.05% c. 5.24% d. 61.0%Why doesn't Earth's rotation provide a suitable time standard?From a distance of 300 km above the surface of the Moon, what is the angular diameter in arc seconds of an astronaut in a space suit who has a linear diameter of 0.80 m as seen from above?
- If the distance between the Earth and the Sun were halved, what would happen to the Sun's angular diameter?According to Kepler's third law of planetary motion, the mean distance D, in millions of miles, from a planet in our solar system to the sun is related to the time P, in years, that it takes for the planet to complete a revolution around the sun, and the relationship is D = 93P 2/3. It takes the planet Pluto 248 years to complete a revolution around the sun. What is the mean distance from Pluto to the sun? What is the mean distance from Earth to the sun? Give your answers to the nearest million miles. from pluto to sun _____ million miles from earth to sun _____ million milesthe angle subtended by the sun observed on earth is about 0.50, the distance to the sun is roughly 1.50 * 10^8 km. find the approximate diameter of the sun