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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 motor has an internal resistance of 12 ohms. When running, the motor has a back emf of 30 V and draws a current of 4.0 A. What is the supply voltage in this case
Two square, oppositely charged conducting plates measure 28cm on each side. The plates are close together and parallel to each other. What would be the electrons acceleration
a parallel-plate air capacitor has a capacitance of 500pf and a charge of magnitude 0.250uc on each plate. the plates
From the information above, determine the direction of the electric field inside the velocity selector.(indicate it on the diagram).
A 7.0 ?, a 15 ? and a 19.0 ? resistor are connected in series with a 24.0 V battery. What is the current in each resistor
In the Bohr model of the hydrogen atom, an electron in the 7th excited state moves at a speed of 4.47 104 m/s in a circular path having a radius of 2.59 10-9 m
A gas in a rigid vessel is at ambient temperature and at a pressure, P1, slightly higher than ambient pressure, P0. Develop an ex- pression that allows a determination of the ratio of specific heats, k, in terms of the pressures.
A large, cylindrical roll of tissue paper of initial radius R lies on a long, horizontal surface with the outside end of the paper nailed to the surface. Determine the speed of the center of mass of the roll
If an astronaut can throw a certain wrench 14 {rm m} vertically upward on earth, how high could he throw it on our moon if he gives it the similar starting speed in both places.
A load of bricks with mass = 15.4 kg hangs from one end of a rope that passes over a small, frictionless pulley. What is the tension in the rope while the load is moving
A bungee cord is stretched between two poles with a force of 383 N. What is the velocity of a wave on this bungee cord
a vector c1 has a magnitude of 40.0 units and points 35.0deg above the positive x axis. a second vector c2 has a
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