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A “Pumpkin Chucker” design for the annual Punpkin Chunkin 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 out smashed and is called pumpkin pie). To test the pumpkins, crew drops the pumpkin onto a solid wood board placed on the deck of their truck. The problem is that they might damage the pumpkin by doing this.
So after many tries, they find that if the pumpkin bounces 1 foot off the board after dropping from 5 feet up, without obvious damage, the pumpkin is resilient enough to be used as ammo. What is the coefficient of restitution needed for good ammo?
Large stationary brayton cycly gas turbine power plant delivers a powr output of 100MW to an electric generator . Minimum temperature is 300K so T1= 300k max temp is 1600k
Explain whether the following situations and should be modeled as closed systems, control volume systems, or transient systems. Convert the following temperatures to °F, °C, K, R (4 pts) a. 98.6 °F b. 298 K c. 5715 °F e. 100 °C. Convert the following..
calculate the critical heat flux on a large horizontal surface for the following fluids at 1 atm mercury ethanol and
a force of 3 n stretches a spring by 1 m. a mass of 4 kg is attached to the spring. at t0 thenbspmass is pulled down a
suppose a pair of rolling element bearings is being considered as the support for the front wheel of a bicycle. the
2 kg of saturated vapour water and 8 kg of saturated vapour refrigerant-134a both at 100 kPa. Which substance will release more energy to completely condense the vapour? Explain
At the proportional limit, a 30 mm wide × 12 mm thick bar elongates 2.0 mm under an axial load of 41.5 kN. The bar is 1.5-m long. If Poisson’s ratio (ratio between longitudinal and lateral deformations) is 0.33 for the material, determine:
determine the equivalent state of stress on an element at the same point oriented 45 degrees clockwise with respect to
with a mass of 1000 kg travels at 80kmh has a four-pad braking system. the microk between the brakes and the wheels is
for a first order system with a transfer function of 15s2 given a unit step input pleasea. derive the transfer function
Two slender rods of negligible weight are pin-connected at A and attached to the 18-lb block B and the 80-lb block C as shown. The coefficient of static friction is 0.55 between all surfaces of contact. Determine the range of values of P for which..
Two same objects with the same initial temperature Ti have a constant specific heat capacity of Cp, now one installs a refrigerator in between these two and tries to lower one of the objects temperatures to T2.
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