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An airplane has an effective wing surfacearea of 10 m2 that is generating the lift force. Inlevel flight the air speed over the top of the wings is 176 m/s,while the air speed beneath the wings is 158 m/s. What is the weight of the plane?
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Two electrons are located at two of the vertices of an equilateral triangle, one at each vertex. What is the net electric field at the third vertex
A certain circuit consists of an inductor of 50 mH in series with a resistor of 180 ?. How long will it take for the current to fall to 7.6 A
If camera is focused for a distance of 20m, should the lens be moved closer to the film or farther from the film to focus on an object 5 m away. Explain why.
Assume that if the shear stress in steel exceeds about 4.00 108 N/m2, the steel ruptures. (a) Determine the shearing force necessary to shear a steel bolt 1.20 cm in diameter. N (b) Determine the shearing force necessary to punch a 1.75-cm-diameter h..
a loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. the
A low-power laser used in a physics lab might have a power of 0.40 mW and a beam diameter of 2.6 mm. Calculate the average light intensity of the laser beam
for a double-slit experiment the inside edges of two 1.65-mm wide slits are separated by a distance of 1.31 mm. the
Some simple elemental superconductors (called type I) are perfect diamagnets, meaning that their internal magnetic field exactly cancels the applied field. What is the susceptibility of such superconductors
Two loudspeakers are placed 3-m apart. They emit 498 Hz sounds, in phase. A microphone is placed 3.2m distant from a point midway between the two speakers, where an intensity highest is recorded.
An electron is in a certain energy state in a one-dimensional, infinite potential well from x = 0 to x = L = 150 pm. What is the change in the electron's energy
A 50.0-kg projectile is fired at angle of 30.0 degrees above the horizontal with an initial speed of 120 m/s from the top of a cliff 142 m above level ground, How much work has been done on the projectile by air friction
You are driving just behind a second car and both of you are moving at a speed 58mi/h. What is the minimum safe distance
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