College Physics
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ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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1) How does the acceleration due to gravity at the surface of a planet change if the planet's radius is doubled ?
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- Physics An intergalactic spaceship arrives at a distant planet that rotates on its axis with a period of T = 43 hours. The mass of the planet is M = 2.7 • 1025 kg. The spaceship enters a circular orbit with an orbital period that is equal to the planet's period for the rotation about its axis, T. Part a) Write an expression for the radius of the spaceship’s orbit R=? Part b) Calculate the orbital radius in metersarrow_forwardQ 1) A satellite weighing ( 700 Ib ) on the surface of the Earth. Calculate the Earth's gravitational force for this satellite when it is positioned at a distance of 36000 km ) from the surface of the Earth, where its rotation speed around the Earth is equal to the speed of the Earth's rotation around itself. 36000 km Earth mass ( Me ) = 5.97 × 1024 kg. Radius of the Earth ( Re ) = 6371 km. -arrow_forwardA 2.00 x 102 kg satellite is in circular orbit at a height of 6.00 x 102 km above the earth’s surface a. Solve for the speed of the satellite.arrow_forward
- 3. Calculate the force of gravity on a 70 kg person at the surface of the earth and at a distance of four times the Earth's radius. The distance between the person and the earth is always measured from the center of the Earth. (Use G, Mg and Refrom the question #1)arrow_forwardExample 4. A satellite is orbiting a circular orbit at an altitude of 900 km, at which atmosphere density is 5.46 x 10-13kg/m³. The satellite has mass 150kg, cross sectional area 1.50m², and drag coefficient 2. a) Calculate the rate of change of orbit radius da/dt in units of m/s. b) Make an estimate of the time (in years) that will take the satellite to reach the Earth.arrow_forwardCurrent Attempt in Progress One model for a certain planet has a core of radius R and mass M surrounded by an outer shell of inner radius R, outer radius 2R, and mass 4M. If M-2.97 x 1024 kg and R-8.31 x 10 m, what is the gravitational acceleration of a particle at points (a) R and (b) 3R from the center of the planet? (a) Number (b) Number Units Unitsarrow_forward
- Palapa satellites orbit the earth 24-hour period. If the palapa satellite orbits planet x which has the same mass as the mass of the earth. And the radius is 4 times the radius when it orbits the earth. Then the satellite orbits planet x by?arrow_forwardA 20 kg sphere is at the origin and a 10 kg sphere is at (x, y) = (20 cm, 0 cm). At what point or points could you place a small mass such that the net gravitational force on it due to the spheres is zero?arrow_forwardThe orbit of the planet Venus is nearly circular with an orbital velocity of 126.5x103 km/h. Knowing that the mean distance from the center of the sun to the center of Venus is 108.5?1021 km and that the radius of the sun is 695.5x103 km, determine (a) the mass of the sun, (b) the acceleration of gravity at the surface of the sun.arrow_forward
- The planet Mars has a satellite, Phobos, which travels in an orbit of radius 9.4 xm with a period of 7 hr 39 min. Calculate the mass of Mars from this information.arrow_forwardA hypothetical planet has a radius 1.6 times that of Earth but has the same mass. - What is the acceleration due to gravity near its surface?arrow_forwardAn object weighs 90 N on Earth’s surface. Determine its weight when it is two Earth radii from the planet’s surface.arrow_forward
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