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The airplane can take off when its airspeed (speed of the air flowing over the wing) is equal to 65 knots. What is the length of runway required for the plane to take off if there is a 13 knots head wind?
the temperature coefficient of resistivity for the metal gold is 0.0034 cdeg-1 and for tungsten it is 0.0045 cdeg-1.
a research submarine has a 40cm diameter window that is 8.2cm thick. the manufacturer says the window can withstand
a 12,000 volt line produces 100,000 watts with a current of8.3 amps. If the voltage were only 240 volts, what would be the power expended as heat
In this problem let the +x-axis be horizontal and the +y-axis be straight up. A rocket is launched from rest on the ground. Find the components of the rocket's velocity vector at that time
A certain object has a mass in air of 0.422 kg and a mass whensubmerged in benzene (Dbenzene = 0.90 X 103 kg/m3) of 0.367 kg. Determine the density of the object and the density ofthe unknown liquid
The angular speed can be represented as ? = (rad/s)(1 rev/2p rad) = 2.53e7 rev/s. The electrons travel around a circle of radius .07m, 25 million times per second. What is the period of revolution of the electrons
The speed of light in a certain substance is 89% of its valuein water. What is the index of refraction of this substance
Three equal blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force F. Obtain what is the magnitude of the force
What are the design features in an aircraft that affect an aircraft's takeoff and landing performance? Research an airplane and describe what features are used.
a rock is thrown downward into a well that is 8.85 m deep. if the splash is heard 1.20 seconds later, what was the initial speed of the rock
In order to drink from your glass you first need to lift it to your mouth. As you begin to lift your 0.20 kg glass of water, it is accelerating upwards at 0.090 m, What is the net force acting on the glass
After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state. Calculate the surface free-fall acceleration
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