If you stood on Earth during its formation, during which it captured about 2.1 x 1011 particles per second, and watched a region covering 260 m2, how many impacts would you expect to see in an hour? (Notes: The surface area of a sphere is 4tr?. Hint: Assume that Earth had its current radius of 6,378 km.) impacts
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- Galileo is often credited with the early discovery of four of Jupiters many moons.The moons orbiting Jupiter follow te same laws of motion as the planets orbiting the sun.One of the moons is called Io - its distance from Jupiter's center is 4.2 units and it orbits Jupiter in 1.8 Earth-days.Another moon is caled Ganymede;it is 10.7 units from Jupiters center. Make a prediction of the period of Ganymede using Keplers law of periods.An asteroid orbits the Sun with semi- major axis = 10 AU and eccentricity e = %3D %3D 0.6. Calculate the ratio of the maximum to the minimum amount of energy it receives from the Sun per second during its orbit. Select one: а. 8 O b. 64 О с. 2 O d. 16 е. 415. An object is dropped above the surface of planet Nexus and falls 11.2 meters in 2.4 seconds. What is the mass of the planet Nexus ? (assume: I the radius of the plane Nexus is 3.45-100 meters and G = Nm²/kg, initial velocity of the object is 0 m/s) 6.670-10-¹1 16. An object is launched at a velocity of 33 m/s in a direction making an angle 34° upward with the horizontal. What is the total flight time of the object? (assume g 9.81 m/s²)
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