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A package is dropped from an air balloon two times.In the first trial the distance between the balloon and the surface is H and in the second trial 4H.Compare the time it takes for the package to reach the surface in the second trial to that in the first trial.?
a 50 kg crate resting on a flat smooth surface is acted upon by a horizontal force that varies by the equation f1.5x
car a is speeding in the positive x direction and is about to run through a red light and collide with car b heading
a shaft of radius r and length l is subjected to a uniformly distributed shear. the shaft is fixed at one end and not
What is the couple moment of the two couples that act on the pipe assembly. The distance from A to B is d = 400 mm.express the result as a cartesian vector.
Determine the load F which the double strap butt joint shown in Figure can carry. The rivets are 6 mm in diameter with an ultimate shear strength of 325 MPa. A factor of safety of 8 is to apply.
the exhaust from a natural gas heating is expelling combustion products at a rate of 10 mole per minute. on a mass
determine the shortest time possible for the rear wheel drive 2 mg truck to achieve a speed of 16 ms with a constant
A 2 lb rocket is launched from the ground, with its launch rail elevated at an angle of 70° from ground, with zero initial speed. Assuming its motor provide a thrust force T = 25 lb for the period of 0 _ 0.1 s, no air resistance, constant gravitatio..
using the van der waals equation of state derive an expression that gives the isothermal change of internal energy with
a double acting hydraulic cylinder rod diameter frac34 inches is used to compress garbage. this operation requires a
in a rigid tank water is heated by a benson burner while being stirred by a paddle wheel. initially the internal energy
What is the temperature 7 cm from the base if the rod is made of a) pure zinc b) lead c) pure gold. Which will be the hottest at this point? What energy input is needed to keep the base temperature at the 175 degrees for each metal?
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