College Physics
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Publisher: Cengage Learning
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The Earth has a mass of 5.97 * 1024 kg and the Moon has a mass of 7.35 * 1022 kg. If they are separated by a distance of 3.85 * 105km, what is the force (in N) between the Earth and the Moon? (Enter your answer in scientific notation: 1.23E12 means 1.23 * 1012)
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- Astronomers are constantly discovering new planets orbiting nearby stars. In the following scenarios, compare the gravitational force between the planet and its star to the gravitational force between the Earth and the Sun and enter your result as a decimal with no units. (For instance, if the gravitational force between the planet and the star is 1/4 the gravitational force between the Earth and the Sun, enter 0.250)A planet that has a mass 8.98 times that of the Earth is orbiting a star that has the same mass as the Sun. The planet orbits at an average distance of 1.00 AU. How does the gravitational force between this planet and its star compare to the force between the Sun and the Earth? A planet that has a mass equal to that of the Earth is orbiting a star that has the same mass as the Sun. The planet orbits at an average distance of 1.95 AU. How does the gravitational force between this planet and its star compare to the force between the Sun and the Earth? Tries 0/5 A…arrow_forwardKepler's third law states that the relationship between the mean distance d (in astronomical units) of a planet from the Sun and the time t (in years) it takes the planet to orbit the Sun can be given by d^3 = t^2. (A). It takes Venus 0.616 years to orbit the Sun. Find the mean distance of Venus from the Sun (in astronomical units). (B). The mean distance of Jupiter from the Sun is 5.24 astronomical units. How many years does it take Jupiter to orbit the Sun?arrow_forwardAt an altitude of 160 km above the earth's surface, a 3-kg mass is pushed vertically upward with a velocity of 16,000 km/h. Using the radius of the earth equal to 6357 km, calculate the maximum distance from the earth's surface reached by the mass. Present your answer in km using 4 significant figures.arrow_forward
- What is the mass of the sun if the radius is 7.1*10^8 and the gravitational acceleration is 270? Round your answer to the nearest hundredth and use scientific notation.arrow_forwardThe acceleration due to gravity for Earth is inversely proportional to the square of the distance between the centre of Earth and the object being pulled. The acceleration of gravity is 9.8 m/s? at Earth's surface, which is 10. 6400 km from the centre of Earth. Find an equation to represent the acceleration due to gravity, g (in m/s?), as a function of the distance, d (in km), from the centre of Earth. a) Hint: Your equation should have a very large number in it. The orbital distance of the International Space Station is 400 km above Earth's surface (or 6800 km from Earth's centre). What is the acceleration due to gravity on the Space Station? b) Hint: Your answer may confuse you if you think of space as being "weightless". It isn't. De thearrow_forwardUntil 1883, every city and town in the United States kept its own local time. Today, travelers reset their watches only when the time change equals 1.0 h. How far, on average, must you travel in degrees of longitude between the time zone boundaries at which your watch must be reset by 1.0 h? (Hint: The Earth rotates 360° in about 24 h.)arrow_forward
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