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The air pressure on the bottom of an airplane's wings is greater than the pressure on the top, providing an upward lift. Calculate the surface area of the wings required to lift a plane weighing 5.30 x 105 N if the pressure difference is 0.101 atm.
a river is 175 meters wide and has a current that is flowing at 4 meterssecond from the north to the south. a swimmer
A 0.144 kg baseball is moving towards home plate with a speed of 43.0 m/s when it is bunted. The bat exerts an average force of 6.50 x 103 N on the ball for 1.30 ms. What is the final speed of the ball
A series of circuit consisting of an unchanged 2 µF capacitor and a 10 MW resistor is connected across a 100 Volt power source. Calculate the current in the circuit and the charge on the capacitor
starting from rest a disk rotates about its central axis with constant angular acceleration. in 8.0 s it rotates 50
A 90-g aluminum calorimeter contains 390 g of water at an equilibrium temperature of 20°C. What is the specific heat capacity of the 160-g piece of metal
Ice cubes and water are in equilibrium at -2 degrees Celsius. Ice cubes float with (4/5) their volume submereged in water at the triple point at .01 degrees Celsius, 612 Pascals. The latent heat of sublimation of ice at the triple point is 277600..
The resolution of the eye is eventually limited by the pupil diameter. What is the smallest diameter spot the eye can produce on the retina if the pupil diameter is 3.69 mm? Suppose light with a wavelength of λ = 550 nm.
If Aristotle and Galileo were able to discuss the motion of two falling weights, light steel ball an d a heavy lead ball, What about its motion would they have agreed and disagreed about
A person with a near-point distance of 32 cm is able to get a usable magnification of 12 with a particular magnifying glass. Her friend is only able to get a usable magnification of 7. What is the friend’s near-point distance?
a constant force of 20 n is applied to an object of mass 8.0 kg at an angle of 25deg with the horizontal. what is the
a 3.45 g hockey puck rests on a flat smooth table.a horizontal net force of 85.0 n acts on it for 1.10 seconds. the
A model rocket blasts off and moves upward with an acceleration of 11m/s^2 until it reaches a height of 28m, What is the maximum height attained by the rocket
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