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(a) Find the pressure difference on an airplane wing if air flows over the upper surface with a speed of 114m/s , and along the bottom surface with a speed of 107m/s.
(in kPa)
(b) If the area of the wing is 32m2 , what is the net upward force exerted on the wing?
(in kN)
A truck has its front wheels (only) driven onto a scale and a reading of 3000 kg is obtained. How far is the center of gravity from the front wheels
Ladder 6.55 m long leans against the side of a building. If the ladder is inclined at an angle of 65.5° to the horizontal, what is the horizontal distance from the bottom of ladder to the building.
A certain automobile engine is performing work at the rate of 33900 W (45 hp) with an efficiency of 27%
An amateur radio operator wishes to build a receiver that can tune a range from 13.8 MHz to 15.1MHz, What is the required value of the constant inductance
With a particular grating a doublet of the two wavelengths 731.3 and 732.1 nm is viewed in the third order at 9.3° to the normal, find the grating spacing in nanometers
Jane and Jon, with masses of 50 kg and 60kg, respectively,stand on a frictionless surface 10m apart, What is JOhn's acceleration
Considering just the Sun and Jupiter, determine the radius of the circular orbit the Sun makes about the Sun-Jupiter center of mass
Chameleons catch insects with their tongues, that they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable 250 m/s^2 for 20 {rm ms}, then travels at constant speed for another 30 {rm ms}.
A 10.5 kg uniform board is wedged into a corner and held by a string at a 50 degree angle. Determine the tension in the string. Hint: take torques about the corner and assume any length for the board.
A spool of thin wire rotates without friction about its axis. A man pulls down on a wire connected to an inner radius with force of 16.10 N. How long does it take to enlarge the angular velocity of the spool from 11.00 rad/s to 39.00 rad/s? Icm = ..
An electric blanket is connected to a 120-V outlet and consumes 110 W of power. What is the resistance of the heater wire in the blanket
A mass m1 = 3.8 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 5.5 kg which hangs freely from the string, What is the tension in the string as the block falls
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