Satellite Motion: The International Space Station is orbiting at an altitude of about 370 km above the earth's surface. The mass of the earth is 5.97 × 1024 kg, the radius of the earth is 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2. Assume a circular orbit.(a) What is the period of the International Space Station's orbit?(b) What is the speed of the International Space Station in its orbit?

What will be an ideal response?


(a) 5.5 ×103 s (b) 7.7 ×103 m/s

Physics & Space Science

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Magnet A has twice the magnetic field strength of Magnet B and at a certain distance pulls on magnet B with a force of 100 N. The amount of force that magnet A exerts on magnet B is

A) at or about 50 N. B) exactly 100 N. C) need more information

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Which of the following has the greatest number of significant figures?

A) 03.1400 B) 314.1 C) 3.142 D) 000.3140 E) 0.003142

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A 200-volt battery is connected to a 0.50-microfarad parallel-plate, air-filled capacitor. Now the battery is disconnected, with care taken not to discharge the plates. Some Pyrex glass is then inserted between the plates, completely filling up the space. What is the final potential difference between the plates? (The dielectric constant for Pyrex is ? = 5.6.)

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An object is 80 cm in front of a lens. An image forms 10 cm behind the lens. The lateral magnification

A) is -8. B) is -0.125. C) is 8. D) is 0.125. E) cannot be determined with the information given.

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