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The 1st man to orbit the Earth was Soviet cosmonaut Yuri Gagarin, on April 12, 1961. His spacecraft, Vostok I, was a sphere about 2.3 m in diameter, and it reached a maximum altitude above Earth's surface of 327 km. What was the spacecraft's speed at this point in its orbit?
What is the amplitude of the oscillations . Could you think of a simple method for determining the focal length of a converging lens.
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, Determine the minimum speed the roadrunner must have to reach the cliff before the coyote
A violin string is 33 cm long. The wave speed is 140 m/s. what are the wavelengths of the first 3 harmonics
A 10,000 kg empty railroad car moving at 3 m/s collides with a loaded railroad car weighing 196,000 N and couples with it
In 1939 or 1940, Emanuel Zacchini took his human-cannonball act to an extreme: After being shot from a cannon, he soared over three Ferris wheels and into a net, If he reached maximum height over the middle wheel, by how much did he clear it
Two kids of masses 45 kg and 30 kg sit on the opposite sides of a seesaw. The 45 kg kid sits in the left at a distance of 54 cm from a frictionless axle. determine The force that the axle must exert
A certain car battery with a 12.0 V emf has an initial charge of 115 A·h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how various hours can it deliver energy at the rate of 110 W.
An automobile battery has an emf of 12.60 V and an internal resistance of 0.084 0 ?. The headlights together have an equivalent resistance of 5.800 ? (assumed constant).
A beam of unpolarized light shines on a stack of five ideal polarizers, Find the angle between the axes of each pair of adjacent polarizers
Explain how to determine the total resistance of a parallel and a series circuit. How does total resistance affect the current in each type of circuit
Compute the net electric flux through the hull of the submarine. Is the number of electric field lines leaving the submarine greater than, equal to, or less than the number entering it?
A 40.0 kg wagon is towed up a hill inclined at 18.5o with respect to the horizontal. What is the acceleration of the wagon
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