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The Piper Cherokee (a light, single-engine general aviationaircraft) has a wing area of 150 ft2 and a wing span of32 feet. Its maximum gross weight is 2,250 lb. The wing uses a NACA65-415 airfoil, with a lift slope of 0.1033 degree-1 andalpha(L=0) = -3deg. Assume tau = 0.12. If the airplane is cruisingat 100 mi/h at standard sea level at its maximum gross weight and is in straight and level flight, calculate the geometric angle ofattack at the wing.
A car is safely negotiating an unbanked circular turn at a speed of 18 m/s. The road is dry, and the maximum static frictional force acts on the tires. find to what speed must the driver slow the car
A 0.20 kg hockey puck slides across a frictionless ice rink at a constant speed of 25 m/s. Ignoring air resistance, what is the work done on the puck while it is sliding
A 4.0 kg mass is hung from a string which is wrapped around a cylindrical pulley (a cylindrical shell), what is the mass of the pulley
how many electrons must be removed from each of two 5.0-kg. copper spheres to make the electric force of repulsion
before a lightning strike can occur the breakdown limit for damp air must be reached. if this occurs for an electric
A beetle sits at the top of a bicycle wheel and flies away just before it would be squashed. assuming that the wheel turns clockwise, the beetle's angular displacement is π rad, which corresponds to an arc length of 1.2 m. what is the wheel's radius?..
Suppose that a circular parallel-plate capacitor has radius R0=3.0cm and plate separation d=5.0mm . A sinusoidal potential difference V=V0sin(2θt) is applied across the plates, where V0=150V and f=60Hz. In the region between the plates, find the m..
A 12 Volt battery (potential source) is connected across a 6 µF air filled capacitor. Determine how much energy can be stored his way
A hoop and a disk, both of 0.58- m radius and 3.0- kgmass, are released from the top of an inclined plane 2.5 m high and8.8 m long. What is the speed of each when it reaches the bottom?Assume that they both roll without slipping.
The work done by an external force to move a -7.75 µC charge from point a to point b is 25.0 ? 10-4 J. What is the magnitude of the potential difference between a and b
What happens to the period of a mass-on-a-spring simple harmonic oscillator if the mass is doubled? What happens to the period if the spring constant is reduced by a factor of 3? How does the period depend on the amplitude of the oscillation?
On an ice rink two skaters of equal mass grab hands and spin in a mutual circle once every 2.7s. how hard are they pulling on one another
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