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A train consists of 50 cars, each of which has a mass of 7.2× 103kg. The train has an acceleration of+7.9 × 10-2m/s2. Ignore friction and determine the tension in the coupling(a)between the 30thand 31stcars and(b)between the 49thand 50thcars.
Two geological field teams are working in a remote area. A globalpositioning system (GPS) tracker at their base camp shos the location of the first team as 36km away, 13degree north of west,and the second team as 22km away, 37degree east of north.
A sound source is moving away from the stationary listener at 80 m/s. Find the frequency heard by the listener
Trucks can be run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 611 rad/s. how many minutes can it operate between chargings
The suspension cables on the Brooklyn Bridge are 15.75 in. diameter wire ropes. Estimate the total drag force on one of the cables in a 40 mph wind if the length of one cable is about 3000 ft and the air temperature is 70o F.
A two-slit pattern is viewed on a screen 1.08 m from the slits. what is the total width of the central bright fringe
Popitronium is a hydrogen atom with the proton replaced by a positron (like electron, but w/ positive charge). Calculate E1 for popitronium.
A 72-kg fisherman in a 133-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 4.2 m/s, find the velocity of the boat after the package is thrown
A stream is 3.00 m wide and .500 m deep. Water flows at1.20 m/s over the bring of the waterfall 5.00 m high. how much pwoer would be produced
how much money does it cost to leave a 100 watt light bulb on for 1 hour if electricity sells for 10cents per kW-h. a) 1cent b) 8 cent c) 22 cent d) 44cent e)100 cent
A thick, vertical iron pipe has an inner diameter of 0.077 m. A thin aluminum (? = 23x10-6 (C°)-1) disk, What is the temperature of the aluminum disk when the disk falls into the pipe
A boat moves through the water with two forces acting on it. One is a 2000 N forward push by the water on the propeller, What will its velocity be at the end of that time
A 78 g arrow is fired from a bowwhose string exerts an average force of 95 N on the arrow over adistance of 84 cm. What is the speed of the arrow as it leaves the bow
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