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A "pumpkin chucker" designed for the annual pumpkin competition held near Millsboro, delaware every fall (first week of November) uses a pneumatic launcher (air cannon) to throw its pumpkin. It is important to know if your "ammunition", the pumpkin, can withstand the force exerted on it during launch) otherwise it comes onto a solid wood board placed on the deck of their truck. The problem is that if the pumpkin bounces 1ft off the board after dropping from 5ft up, without obvious damage, the pumpkin is resilient enough to be used as ammo. What is the coefficient of restitution needed for good ammo?
Write a description of the generation of the following with reference to diagrams. Dry saturated steam. Super heated steam.
an electric current of 5a passing through a resistor has a measured voltage of 6v across the resistor. the resistor is
Niobium has the BCC structure with a density of 8.57 g/cm^3 , an atomic weight of 92.91 g/mol. One atom is associated with each lattice point. Calculate the lattice parameter; and the atomic radius of Niobium.
a 98 kg log is being moved by placing it on two cylinders. when the log has a linear velocity of 2.76 ms a force
a wire of radius ri is coated by a process described above. it is fed to a reservoir filled with a newtonian fluid with
it has been determined that a point in a load-carrying member is subjected to the following stress condition sx 400 mpa
a microscope has a 2.40-cm focal length eyepiece and a 0.810-cm objective lens. for a relaxed normal eye assume a
An alpha-emitter, has been used as a thermal power source, as described in Table 12.2. What is the energy recoverable as heat per decay in MeV? Provide two answers, one assuming all of the energy produced is dissipated as heat, and one assuming only ..
a rigid chamber contains 100 kg of water at 500 kpa 100 c. a paddle wheel stirs the water at 1000 rpm with a torque of
a heat engine is operating on carnot cycle. the waste heat from this engine is rejected to a nearby lake at 62f at a
a crate in the back of a truck with an open tailgate has impending sliding as the truck accelerates from rest to 60 mph
a well insulated piston cylinder device containing 3 lbm of water is compressed using 601 kj of energy. initially the
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