Steel shuttle pulled along square steel rail by elastic cord
A machine has an 760 g steel shuttle that is pulled along a square steel rail by an elastic cord . The shuttle is released when the elastic cord has 25.0N tension at a 45 degree angle.
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You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When you increase your speed by 29%, you are running at the same speed she is. If your mass is 90 kg, what is her mass?
If air enters such a device at 300 kPa, 40 C, at a rate of 0.100 kg/s and air leaves one end at 100 kPa, 50 C, at a rate of 0.060 kg/s, what is the temperature of the air leaving the other end?
Assuming that the flow is adiabatic and that the kinetic energy of the steam at the inlet is negligibly small, determine the inlet temperature if the inlet pressure is 300 kPa.
A .2420g sample containing calcium is dissolved, and the metalprecipitated as CaC2O4. The precipitate is filtered, washed and re-dissolved in acid. The pH is adjusted. 25mL of .0400M EDTA areadded, and the excess EDTA is titrated with 33.28mL of .
If a student finds the molecular weight of an unknown liquid to be 142g/mol and the molecular formula of liquid isCHCl3,what is the percent error in the student'smolecular weight?
A 3.0 kg particle starts from rest at x = 0 and moves under the influence of a single force Fx = 6 + 4x - 3x2, where Fx is in newtons and x is in meters. (a) Find the work done by the force as the particle moves from x = 0 to x = 1.5 m.
When is it more advantageous to have many motor units of only a few muscle fibers each? When is it more advantageous to have fewer motor units that have many muscle fibers?
When the temperature of a "copper" penny (which is not really copper) is raised by 100 C, its diameter increases by 0.18%. a). What is the coefficient of linear expansion?
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What political, economic, and cultural factors are prohibiting world leaders from agreeing on solutions to global environmental challenges?
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