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A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the intersection is 25.0 m. The plane decelerates through the intersection at a rate of 6.3 m/s2 and clears it with a final speed of 47 m/s. How much time is needed for the plane to clear the intersection?
The coils of a motor's rotor have resistance of 2.0 Ω. When the motor runs at full speed, powered by 115V linevoltage it draws a current of 9A. What is the back electromagnetic field (emf) in this motor under those conditions? If the motor is preve..
suppose that earth was formed as molten rock at some very high temperatures. estimate the time for the earth to cool to
The near point of a naked eye is 21 cm. When placed at the near point and viewed by the naked eye, a tiny object would have an angular size of6.0 × 10-5 rad. Find the focal length of the eyepiece
In reality, the COP of the heat pump will only be 60 percent of the ideal value. What is the minimum power of the electric motor when the COP is 60 percent of the ideal value
In the figure 29-49, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 30 cm. The currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3, and each wire carri..
An 9.00-cm-diameter, 330g solid sphere is released from rest at the top of a 1.70-m-long, 20.0? incline. What is the sphere's angular velocity at the bottom of the incline
A tiny sphere with a charge of q = +6.0 µC is attached to a spring. Two other tiny charged spheres, each with a charge of ?4.0-µC, are placed in the positions, in which b = 3.8 cm. The spring stretches 5.0 cm from its previous equilibrium position..
a 180 lb man and a 120 lb woman stand side by side at the same end of a 300 lb boat ready to dive each with a 16 fts
A 5,000 kg satellite is orbiting the Earth in a circular path. The height of the satellite above the surface of the Earth is 800km. The velocity of the satellite is (Me = 5.98 x 10^24 kg, Re = 6.37 x 10^6 m, G = 6.67 x 10-11 N • m2/kg2)
Four point charges, q, are fixed to the four corners of a square that is 11.2 cm on a side. An electron is suspended above a point at which its weight is balanced by the electrostatic force due to the four point charges, at a distance of 11 nm abo..
What is speed of the resulting ball of clay
A playground merry-go-round has a radius of 4.20 and a moment of inertia of 255, What is the work done by the child
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