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You are watching a television show about Navy pilots. The narrator says that when a Navy jet takes off, it accelerates because the engines are at full throttle and because there is a catapult that propels the jet forward. You begin to wonder how much force is supplied by the catapult. You look on the Web and find that the flight deck of an aircraft carrier is about 90.0 m long, that an F-14 has a mass of 29800 kg, that each of the two engines supplies 27000 lb of thrust, and that the takeoff speed of such a plane is about 152 mi/h. Estimate the average force on the jet due to the catapult.
The small currents in axons corresponding to nerve impulses produce measurable magnetic fields. What is the strength of the field at a distance of 1.2mm
A block is on a horizontal surface (a shake table) that is moving back and forth horizontally with simple harmonic motion of frequency 2.3 Hz. How great can the amplitude of the SHM be
A balloon contains 10 lbs of Helium at a temperature of 70 ?F. If the volume of the balloon is 300 ft3, what is the pressure of the balloon
Suppose that gravatational mass and inertial mass aredifferent but they are proportional to one another. Determine the acceleration of a freely falling object near thesurface of the Earth
Without corrective lenses a near sighted person can see clearly only objects that are within 100 cm from his eyes. What type of lens is the contact lens
You melted a copper cylinder of volume 15.0 cm3 to fabricate a thin wire of diameter 0.02 mm. What will be the length of wire formed
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm(red) and 486 nm (blue). What is the distance between the first-order red and blue fringes? (d=)
a tunnel under a river is 2km long. at what frequencies can the air in the tunnel resonate? explain whether it would be
Evangelista Torricelli was the first person to realize that we live at the bottom of an ocean of air. He correctly surmised that the pressure of our atmosphere is attributable to the weight of the air.
A 20-kg sled is pushed up a 34° slope to a vertical height of 140 m. A constant friction force of 50 N acts for the entire distance. What external work was required
The electric motor of a model train accelerates the train from rest to 0.600 m/s in 17.0 ms. The total mass of the train is 585 g. Find the average power delivered to the train during its acceleration
A drinking fountain shoots water about 14 cm up in the air from a nozzle of diameter 0.60 cm. What gauge pressure does the pump have to provide
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