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An airplane wing is designed so that the speed of the air acrossthe top of the wing is 310 m/s when the speed of the air below thewing is 325 m/s. The density of the air is 1.29 kg/m3. What is the lifting force on a wing of area 26 m2.
A cart starts from rest at the top of the tilted track. Assume the track is frictionless. The cart passes photogate A moving at speed 5.41 cm/s, Find the magnitude of the acceleration of the cart
An ideal transformer has 400 turns on its primary and 18 turns on its secondary. what is the power output
The difference in potential between the accelerating plates of a TV set is about 29 kV. The distance between these plates is 1.2 cm. Find the magnitude of the uniform electric field in this region. Answer in units of N/C
Orb spiders make silk with a typical diameter of 0.15 mm.A typical large orb spider has a mass of 0.50 g. by how much will the silk stretch
Calculate the velocity of a 50.0g steel ball shot from a slingshot with a 120N/m spring constant when pulled back 35cm and released
A block of mass 2.50 kg is pushed 2.00 m along a frictionless horizontal table by a constant 16.0 N force directed 25.0° below the horizontal, Determine the work done by the force of gravity
A skier is gliding along at 3.0 m/s on horizontal, frictionless snow. He suddenly starts down a 13 degree incline. His speed at the bottom is 13 m/s. What is the length of the incline
A 7 kg penguin is sliding on his belly down a 23 degree icy slope. What is the magnitude of the normal force Determine magnitude and direction of the parallel acceleration
Water is poured into a container that has a leak. The mass m of the water is given as a function of time t by m = 4.7t0.8 - 2.9t + 19, with t ? 0, m in grams, and t in seconds. (a) At what time is the water mass greatest, and (b) what is that greates..
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge takes 40.0s to speed up
The frequency and wavelength of a transverse wave on a string are 340 Hz and 0.70 m, respectively. what is the linear density of the string
two 2.0-cm-diameter insulating spheres have a 5.50cm space between them. one sphere is charged to 94.0nc the other to
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