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Ten boxes, each 21.0 cm high and weighing180 N, initially are all side by side onthe floor. The boxes are lifted and placed in a vertical stack2.10 m high in a time interval of6.50 s. Compute the power necessary tostack the boxes.
A rocket is launched at an angle of 58.0�° above the horizontal with an initial speed of 102 m/s. Find the maximum altitude reached by the rocket
A jet airplane in level flight has a mass of8.62104kg, and the two wings have an estimated total area of89.0m2. If the speed of air under the wings is232m/s, what is the speed of the air over the wings
The blades of a fan running at low speed turn at 200 rpm.When the fan is switched to high speed, the rotation rate increasesuniformly to 340 rpm in 5.75 s. find the magnitude of the angular acceleration of the blades
A spherical balloon has a radius of 7.5 m, and is filled withhelium. How large a cargo can it lift, assuming that the skin andstructure of the balloon have a mass of 800 kg
Two compact sources of sound oscillate in phase with a frequency of 90 Hz where the speed of sound is 340 m/s. What is the amplitude of the resultant wave at that point
Find out the angular velocity at the beginning of the 4.60 interval; the angular acceleration of the flywheel.
a charge of 5 c moves upward at 2 ms in a magnetic field of 0.3t that points into the page. what is the magnitude and
Suppose you have a tube 1.20 m long, open on both ends. Determine the frequency of the 2nd overtone, assuming the speed of sound to be 343 m/s. Repeat for the same length tube but with a closed end.
why does d account for the reduction of the distance from 8.5 km to a 0 distance. Is this not a reflection of displacement rather than just distance
An engine is built to extract power from the temperature difference in the ocean. what is the maximum theoretical efficiency of such an engine
A newly discovered planet has twice mass of the earth, but the acceleration because of gravity on the new planet's surface is exactly the same as the acceleration due to gravity on the earth's surface. What is the radius Rp of the new planet in te..
A certain species of ionized atoms produces an emission line spectrum according to the Bohr model, Find the next-to-the-longest wavelength in the series of lines
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