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A chick farmer decides to increase the size of her flock from500 chickens to 2000 chickens. She must relieve her husbandsanxiety about the increased noise (he says that 2000 chickens willbe 4x louder than 500 chickens)
Find the change in intensity level and estimate how much louder will the sound be.
A ball is at the top of a ramp that is 4.5 m above a table. If the ball rolls without friction, how fast is it going at the bottom of the ramp
a 3250 kg open railroad car coasts along with a constant speed of 10.6ms on a level track. snow begins to fall
Antarctica is roughly semicircular in shape with a radius of2000km. The average thickness of the ice cover is 3000m. How many cubic centimeters of ice does Antarctica contain
At a particular moment in kayla's skydive, her acceleration is 16 meters/sec^2. how much force of air resistance is acting on her
a roller coaster moves 85m horizontallythen travels 45m at an angle of 30.0 degrees above the horizontal. what is its
Two tugs A and B pull a ship along a direction XO. Tug A exerts a force of 30kN at an angle of 15 degrees to XO, Find the angle X for the resultant force on the boat to be along XO
You pull a 12 kg sled across the floor with a strap that is at an angle of 31° above the horizontal with a force 76 N. Determine the magnitude of the acceleration of the sled, given that the coefficient of kinetic friction between the suitcase an..
If we imagine an electron as orbiting the proton, with the orbit of radius 5 x 10 ^-11 m, what is the total energy of the atom
Suppose an asteroid is found that appears to be heading directly toward Earth (using Earth's location at the time of discovery). It is 4.2 A.U. away (i.e., 4.2 times the Earth-Sun distance), and travelling through the Solar System with a speed of ..
how many 65-w lightbulbs can be connected in parallel across a potential difference of 95v before the total current in
A 54.0-kg woman stands at the western rim of a horizontal turntable having a moment of inertia of 520 kg · m2 and a radius of 2.00 m. Is the mechanical energy of the system constant
a flat 174-turn current-carrying loop is immersed in a uniform magnetic field. the area of the loop is 7.05 cm2 and the
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