The average distance from the centre of Earth to the centre of the Moon is about 384 000 km. The Moon revolves around Earth with a period of about 29.5 days. Calculate the average velocity of the Moon. 3.84 x 10³ km/h 4.22 x 10³ km/h 3.41 x 103 km/h 4.01 x 10³ km/h
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- The Scope and Scale of Physics Find the order of magnitude of the following physical quantities. (a) The mass of Earth’s atmosphere: 5.11018kg : (b) The mass of the Moon’s atmosphere: 25,000kg ; (c) The mass of Earth’s hydrosphere: 1.41021kg : (d) The mass of Earth: 5.971024kg : (e) The mass of the Moon: 7.341022kg : (f) The Earth-Moon distance (semimajor axis): 3.84108m : (g) The mean Earth-Sun distance: 1.51011m : (h) The equatorial radius of Earth: 6.38106m : (i) The mass of an electron: 9.111031kg : (j) The mass of a proton: 1.671027kg : (k) The mass of the Sun: 1.991030kg .The mean distance of a moon from a planet is 3.35×105 miles. Assuming that the orbit of the moon around the planet is circular with 1 revolution taking 26.1 days and 1 day on this planet taking 22 hours, what is the linear speed of the moon. Express your answer in miles per hour.The orbit of Earth’s moon has a period of 27.3 days and a radius (semi-major axis) of 2.57 ×10-3 A.U. = 3.85 × 105 km. What is the mass of Earth? What are the units?
- A climber who is 75 kgs in mass reaches the peak of a mountain. If the mutual attraction between the climber and the Earth is 735.09 N, how tall is the mountain in meters? radius of the Earth = 6.38 x 106 m mass of the Earth = 5.98 x 1024 kgsAccording 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 milesA moon is orbiting its planet in UCM. If the planet has a mass of 2.6 x 1026kg and the moon is orbiting the planet at 6.69 x 10³m/s, then what is the radius of the moon's orbit? r = unit
- Mars has a mass of 6.39 × 1023 kg and radius 3.39 x 106 m. What is the magnitude of the gravitational acceleration g on Mars' surface, in m/s2? Use G = 6.67 x 10-11 N-m2/kg?. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.The astroid belt of our solar system is located between the orbits of Mars and Jupiter. An astronomer is studying an interesting asteroid and has determined that one orbit around the Sun takes it 2.83 years. How far is the asteroid from the Sun? The following constants may be helpful. Earth's distance from the Sun = 1 AU = 1.5 x 1011 m MSun = 2.0 x 1030 kg G = 6.67 x 10-11 N m2 / kg2 1 year = 3.15 x 105 s A)1.5 AU (2.25 x 1011 m) B) 2.0 AU (3.00 x 1011 m) C) 2.5 AU (3.75 x 1011 m) D) 3.2 AU (4.80 x 1011 m) E) 4.8 AU (7.20 x 1011 m)The moon's period of revolution around the Earth is 27.3 d. How far away is the moon from the surface of the Earth? O A) 1.33× 107 m B) 3.83 × 108 m C) 3.77 × 108 m D) 4.88 × 10⁹ m
- 16. Light travels at a speed of about 3.0 108 m/s. How many miles does a pulse of light travel in a time interval of 0.1 s, which is about the blink of an eye? (Δx = mi ). (b) Compare this distance to the diameter of Earth. (Use 6.38 106 m for the radius of the Earth.) Δx DE =Tidal friction is slowing the rotation of the Earth. As a result, the orbit of the Moon is increasing in radius at a rate of approximately 4 cm/year. Assuming this to be a constant rate, how many years will pass before the radius of the Moon's orbit increases by 3.84×106 m (1%)?The mean distance of Mars from the Sun is 1.52 times that of Earth from the Sun. From Kepler’s law of periods, calculate the number of years required for Mars to make one revolution around the Sun; compare your answer with the value given in Appendix C.