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The barrel of a field gun weighs 1500 lb and is returned into firing position after recoil by a recuperator of constant c = 1100 lb. s/ft. Determine
(a) the constant k which should be used for the recuperator to return the barrel into firing position in the shortest possible time without any oscillation,
(b) the time needed for the barrel to move back two-thirds of the way from its maximum-recoil position to its firing position
A puck slides on a surface for 5.6 m before it stops. If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is the force of friction exerted on the puck
The electron in a hydrogen atom is infinitely distant at zero potential energy, What is the nearest principal quantum number in this state
an 8.00kg point mass and a 14.5kg point mass are held in place 50.0 cm apart. Find the magnitude of the acceleration of the particle
A 27-ft chain with mass density4 lb/ft is initially coiled on the ground. How much work in ft-lbs is performed in lifting the chain so that it is fully extended (and one end touches the ground
A refracting telescope is used to view the Moon (diameter 3480 km, distance from Earth 385,000 km). What is the diameter of the image produced by the objective
A mass m1 = 5.8 kg rests on a frictionless table and connected by a mass less string to another mass m2 = 4.5 kg. What is the NET work done on mass
A state-of-the-art n/p/n Si transistor has a signal amplifying or electrically active p-type base layer whose volume is 1μm3 and which is doped with 1018 boron/cm3.- How many transistors must one fabricate to assure 100 good transistors?
An archer pulls the bowstring back for a distance of0.550 m before releasing the arrow. Thebow and string act like a spring whose spring constant is490 N/m. What is the elastic potential energy of the drawn bow?
A garden hose with an internal diamter of 1.9 cm is connected to a (stationary) lawn sprinkler that consists merely of a container with 24 holes, each of 0.13 cm in diamter. If the water in the hose has a speed of 0.91 m/s, at what speed does it leav..
Two identical waves each having an amplitude 0.02 m has a phase difference of ?/8 when they meet at a point. What is the amplitude of the resultant wave at this point? A string whose length is 1.0 m is fixed at both ends and vibrates according to the..
After the second exam, your evil instructor is finally thrown upinto the air at the edge of a cliff with a velocity of 7.50m/s. With what velocity does he hit the ground if he justmisses the edge of the cliff and lands 30.0m below his launchpoint? Ig..
The head of a grass string trimmer has 100g of cord wound on a light, cylindrical spool with inside diameter 3cm and outside diameter 18 cm. What average power is delivered to the head by the trimmer motor while it is accelerating
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