Spinning of the boomerang
Weights are sometimes added to the arms of a boomerang. What effect would this have on the spinning of the boomerang? Where should they be placed for greatest effect? Please indicate the location and explain your reasoning.
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Refrigerant-134a is being transported at .1kg/s through a Teflon tube of inside diameter Di = 25mm and outside diameter Do = 28mm, while atmospheric air at V = 25 m/s and 300K is in cross flow over the tube.
The moment of inertia of a 4.0m long board pivoted at its center is 25kgm2. Find the moment of inertia when it is used as a see-saw with two 50kg kids sitting 1.8mm from the pivot.
The time it takes Alice to walk to the bus stop from her home is Normally distributed with mean 13 minutes and variance 3 minutes2. The waiting time for the bus to arrive is Normally distributed with mean 4 minutes and standard deviation 1 minutes
Now an electric resistor placed in the tank is turned on, and the tank is observed to contain saturated water vapor after 20 min. Determine: the volume of the tank.
Using Normal approximation to Binomial distribution with continuity correction, what is the estimated probability this student obtains a score greater than or equal to 10?
The loop has a mass 60 grams and resistance 2.3 ohms. The magnetic field oscillates in time according to the equation B=B_0 sin(Omega t ), with B_0= 12 T and Omega= 350 rad/s. What is the maximum current that flows in the loop?
The whole system is now heated until the volume of chamber 2 is 0.09 m^3 and the temperature is the same in all chambers. What is the final temperature of this system?
Determine the largest intesity w0 of the distributed load that the beam can support if the beam can withstand a maximum bending moment of Mmax =20knm and a maximum shear force of Vmax=80kn.
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