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A spherical balloon is inflated from a diameter of 10 cm to a diameter of 20 cm by forcing air into the balloon with a tire pump. The initial pressure inside the balloon is 150 kPa. During the process the pressure is proportional to the balloon diameter. Determine the amount of work transfer from the air inside the balloon to the surrounding atmosphere
air is heated at steady state as it flows through a constant area duct. at the inlet the pressure is 2.8 bar the
How many engagement points on the flywheel would be necessary to make this machine safe
there are three phases in a reservoir oil gas and water. assuming that all pores are occupied by fluids and the volume
a floating platform weighs 30 kn. a hollow sealed cylinder 1 m in diameter weighs 1 kn per meter of length. the water
the composite beam is made of a-36 steel a bonded to c83400 red brass b and has the cross section shown. if it is
If we have |N|(en) + F - W = 0 Where The unit vector of N is give, F components unknown and W is only -3400 j. What is the first step to solve for an unknown.
the velocity of a lift increases uniformly from zero to its maximum value at mid-height (1.4m) in 7.5s and then decreases uniformly to zero in 7.5s. The peak power output is 6kW when the velocity is maximum, determine the maximum lift force provid..
at a given instant train e has a speed of 20ms and an acceleration of 14ms2 acting in the direction shown 75 degrees to
measurements of drag force are made on a model automobile in a towing tank filled with fresh water. the model length is
the radial component of velocity of water leaving the centrifugal pump sketched in figure is 30 fts. the magnitude of
the environment in a certain area is 15 degrees c. plot the maximum efficiency of a nuclear power plant as a function
the suspended load exerts a force F=600 lb at A, and the weight of the bar OA is negligible. Determine the tensions at the cables and the reactions at the ball and socket support O
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